Why is this variable changing?

Hello, so i made this script that generates a lightning bolt that follows a random path out of the player (https://imgur.com/a/eknhlJL , made this with the help of some free models).

Using this concept I am trying to make a wand that casts some kind of electricity spell. I want this spell to have the same kind of trail but i keep running into this issue where the variable won't change.

this is the part of the wand script that causes the problem: (NOT the full script)

            local ball = Instance.new("Part", JunkStore)
            ball.Name = "ball"
            ball.Size = Vector3.new(0.2,0.2,0.2)
            ball.Anchored = false
            ball.CanCollide = false
            ball.CFrame = wandtip.CFrame * CFrame.new(0,0,-0.75)

            local BV = Instance.new("BodyVelocity",ball)
            BV.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
            BV.Velocity = mousehit.lookVector*10
            wait(0.1)

            PreviousB = ball.CFrame.Position

            Run.Heartbeat:Connect(function()
                print(PreviousB,"WAND")

On line 16 it always prints out the same number,

however if i try this on the other script that generates the trail on the player:

Object = Player.Character.HumanoidRootPart

Run = game["Run Service"]

PreviousP = Object.CFrame.p

Player.Character.Humanoid.WalkSpeed = 100

Run.Heartbeat:Connect(function()
    print(PreviousP)

here it always prints out a different number

I really don't understand why the variable changes with the player's script but not with the wand's script.

If any of this is unclear just comment and i'll try to explain it further.

Thanks for trying to help!

FULL SCRIPTS:

Wand:

wait(0.5)
wand = script.Parent
wandtip = wand.WandTip
player = script.Parent.Parent.Parent
playername = player.Name
char = workspace:WaitForChild(playername,5)
Humanoid = char:WaitForChild("Humanoid")

MouseSyncEvent = game.ReplicatedStorage.WandMouseSyncToScript

WandUI = player.PlayerGui.WandUI
WandUIScript = WandUI.MainUIScript

saf = Humanoid:LoadAnimation(wand.Stuffs["Swish And Flick"])
animDB = false

Run = game["Run Service"]
rate_per_second = 2


SpellVal = 0
--
Spell1 = false
Spell2 = false
Spell3 = false
--

JunkStore = Instance.new("Model",workspace)

script.Parent.Equipped:Connect(function()
    WandUI.Enabled = true
    WandUIScript.Disabled = false
end)

script.Parent.Unequipped:Connect(function()
    WandUI.Enabled = false
    WandUIScript.Disabled = true
end)

game.ReplicatedStorage.ValueMoverWand.OnServerEvent:Connect(function(p,SVall)
    SpellVal = SVall
end)

script.Parent.Activated:Connect(function()
    if animDB == false then
        animDB = true
        saf:Play()

        MouseSyncEvent.OnServerEvent:Connect(function(p,mh) -- probs not efficient but will do 
            mousehit = mh
        end)

        --Spellcasting--
        if SpellVal == 0 then -- No magic / False cast
            wandtip.Sparks1.Enabled = true
            wandtip.Sparks2.Enabled = true
            wait(0.5)
            wandtip.Sparks1.Enabled = false
            wandtip.Sparks2.Enabled = false
        end

        if SpellVal == 1 then -- Electricity
            local children = JunkStore:GetChildren()-- delete old electricity bolt

            for i=1,#children do
                if children[i].Name == "ball" then 
                    children[i]:Destroy()
                end
            end

            --

            local ball = Instance.new("Part", JunkStore)
            ball.Name = "ball"
            ball.Size = Vector3.new(0.2,0.2,0.2)
            ball.Anchored = false
            ball.CanCollide = false
            ball.CFrame = wandtip.CFrame * CFrame.new(0,0,-0.75)



            local BV = Instance.new("BodyVelocity",ball)
            BV.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
            BV.Velocity = mousehit.lookVector*10
            wait(0.1)

            PreviousB = ball.CFrame.Position

            Run.Heartbeat:Connect(function()
                print(PreviousB,"WAND")

                if (ball.CFrame.p - PreviousB).magnitude > 1 then
                    local distance = (ball.CFrame.Position - PreviousB).magnitude

                    ---
                    local Path = Instance.new("Part",ball)
                    Path.Anchored = true
                    Path.CanCollide = false
                    Path.Size = Vector3.new(0.1,0.1,distance)
                    Path.CFrame = CFrame.new(ball.CFrame.Position, PreviousB) * CFrame.new(0,0,-distance/2)

                    local Point1 = Instance.new("Part",ball)
                    Point1.Anchored = true
                    Point1.CanCollide = false
                    Point1.Size = Vector3.new(0.2,0.2,0.2)
                    Point1.CFrame = Path.CFrame * CFrame.new(0,0,-Path.Size.Z/2)
                        * CFrame.new(Path.Size.X/2 ,0 ,0)
                        * CFrame.new(math.random(-1,1),math.random(-1,1),0)
                end
            end)
        end

        if SpellVal == 2 then -- Bombarda

        end
        ----------------

        wait(0.5)
        animDB = false
    end
end)

Player lightning bolt:

wait(0.5)
Player = game.Players.LocalPlayer
Object = Player.Character.HumanoidRootPart

Arm1 = Player.Character.RightUpperArm
PreviousA1 = Arm1.CFrame.p

LightMaxX = 1
LightMinX = 0
LightMaxY = 1
LightMinY = 0

Color = BrickColor.Yellow()
PColor = Color3.new(255,255,0)

orbFX = game.Lighting.OrbFX
FX = orbFX.TrailBoltsFLASH

PrevPoint1 = nil
PrevPoint2 = nil

Run = game["Run Service"]

PreviousP = Object.CFrame.p

Player.Character.Humanoid.WalkSpeed = 100

Run.Heartbeat:Connect(function()
    print(PreviousP)
    if (Object.CFrame.p - PreviousP).magnitude > 5 and Player.Character.Humanoid.WalkSpeed > 25 then

        local Model = workspace.Ray

        local distance = (Object.CFrame.p - PreviousP).magnitude
    ---------

    local Light = Instance.new("Part",Model)
    Light.Anchored = true
    Light.CanCollide = false
    Light.Transparency = 1
    Light.BrickColor = BrickColor.Black()
    Light.Size = Vector3.new(0.1,0.1,distance)
    Light.CFrame = CFrame.new(Object.CFrame.p , PreviousP) * CFrame.new(0,0,-distance/2)

    local Point1 = Instance.new("Part",Model)
    Point1.Transparency = 1
    Point1.Anchored = true
    Point1.CanCollide = false
    Point1.Size = Vector3.new(1,1,1)
    Point1.CFrame = Light.CFrame * CFrame.new(0,0,-Light.Size.Z/2)
     * CFrame.new(Light.Size.X/2 ,0 ,0)
     * CFrame.new(math.random(LightMinX,LightMaxX),0,0)
     * CFrame.new(0,math.random(LightMinY,LightMaxY),0)

    local Point2 = Instance.new("Part",Model)
    Point2.Transparency = 1
    Point2.Anchored = true
    Point2.CanCollide = false
    Point2.Size = Vector3.new(1,1,1)
    Point2.CFrame = Light.CFrame * CFrame.new(0,0,Light.Size.Z/2)
     * CFrame.new(Light.Size.X/2 ,0 ,0)
     * CFrame.new(math.random(LightMinX,LightMaxX),0,0)
     * CFrame.new(0,math.random(LightMinY,LightMaxY),0)

if PrevPoint2 == nil or PrevPoint2 == "Empty" then
        local distance = (Point2.CFrame.p - Point1.CFrame.p).magnitude
        local bolts2 = FX:Clone()
        local Light = Instance.new("Part",Model)
        bolts2.Parent = Light
        Light.Anchored = true
        Light.CanCollide = false
        Light.Transparency = 0
        Light.Size = Vector3.new(0.1,0.1,distance)
        Light.Material = "Neon"
        Light.BrickColor = Color
        Light.CFrame = CFrame.new(Point2.CFrame.p , Point1.CFrame.p) * CFrame.new(0,0,-distance/2)
    elseif PrevPoint2 ~= nil then
        local distance = (Point2.CFrame.p - PrevPoint2).magnitude
        local bolts2 = FX:Clone()
        local Light = Instance.new("Part",Model)
        bolts2.Parent = Light
        Light.Anchored = true
        Light.CanCollide = false
        Light.Transparency = 0
        Light.Size = Vector3.new(0.1,0.1,distance)
        Light.Material = "Neon"
        Light.BrickColor = Color
        Light.CFrame = CFrame.new(Point2.CFrame.p , PrevPoint2) * CFrame.new(0,0,-distance/2)      
    end

    PreviousP = Object.CFrame.p
    PreviousA1 = Arm1.CFrame.p

    PrevPoint1 = Point1.CFrame.p
    PrevPoint2 = Point2.CFrame.p

    local Children = Model:GetChildren()
    for i = 1,20 do
    local Remove = coroutine.wrap(function()

    for i = 1,#Children do
        if Children[i]:IsA("Part") then
        Children[i].Transparency = Children[i].Transparency + 0.07 --change transparency for length of the streak
            if Children[i].Transparency >= 1 and Children[i] ~= Light and Children[i] ~= Point1 and Children[i] ~= Point2  then
                game.Debris:AddItem(Children[i],0)
            end
        end
        if Children[i].ClassName ~= "Part" then
            game.Debris:AddItem(Children[i],0)
        end
    end   

    end)
        Remove()
        wait(0.0001)
    end
    game.Debris:AddItem(Light,0)
    game.Debris:AddItem(Point1,0)
    game.Debris:AddItem(Point2,0)

end
end)