Raycast gun increasing the players kills for every shot instead of once when the shot player dies?

In my game, I have a gun that uses raycasting. I want to give the player +1 "VampireKills" when the vampire they shoot dies. But instead of doing the intended function, the player gains +1 kills for every shot they landed beforehand. Another problem is that when the player shoots a vampire and they die by any other means, the player will still get the kill(s). Help would be appreciated. Heres a snippet of the gun's code. The function that gives them a kill is located at line 59.

if result then
        local part = result.Instance
            local humanoid = part.Parent:FindFirstChild("Humanoid") or part.Parent.Parent:FindFirstChild("Humanoid")
            local hitbox = part
        local torso = part.Parent:FindFirstChild("Torso") or part.Parent.Parent:FindFirstChild("Torso")
        local root = part.Parent:FindFirstChild("HumanoidRootPart") or part.Parent.Parent:FindFirstChild("HumanoidRootPart")
        local charactervalues = part.Parent:FindFirstChild("charactervalues") or part.Parent.Parent:FindFirstChild("charactervalues")
            local material = part.Material

            if part.Name == "Part" or part.Name == "Union" or part.Name == "Wall" or part.Name == "Mattress" or part.Name == "Eqa" or part.Name == "Handle" or part.Name == "Lever" or part.Name == "Union" or part.Name == "Bulb" or part.Name == "Light" or part.Name == "Lever1" or part.Name == "Lever2" or part.Name == "Metal1" or part.Name == "Sand" or part.Name == "Arm" or part.Name == "Floor" or part.Name == "Frame" or part.Name == "Glass" or part.Name == "Paint" or part.Name == "Seat" or part.Name == "VehicleSeat" or part.Name == "Wedge" or part.Name == "Baseplate" or part.Name == "Base" or part.Name == "Crane" or part.Name == "Forklift" or part.Name == "MeshPart" or part.Name == "Hook" or part.Name == "Pallet" or part.Name == "Monitor 3" or part.Name == "RopeCapRoundBase" or part.Name == "RopeShaftRoundSmoothBase" or part.Name == "Trashcan" or part.Name == "Support" or part.Name == "Vending Machine" or part.Name == "Ambient Light" or part.Name == "Attach" or part.Name == "Main" or part.Name == "Pillar" or part.Name == "Truss" or part.Name == "IndoorWall" or part.Name == "Bathroom doors" or part.Name == "door frame" then
                if part.Material == Enum.Material.Plastic or part.Material == Enum.Material.SmoothPlastic or part.Material == Enum.Material.Neon or part.Material == Enum.Material.Fabric then

                    local plastic = game.ServerStorage.bullethits.PlasticHit:Clone()
                    plastic.Parent = game.Workspace.Thrown

                plastic.Position = result.Position
                    plastic.Sound.PlaybackSpeed =   random:NextNumber(0.5, 1.5)
                    plastic.Script.Enabled = true
                    plastic.Sound:Play()
                elseif part.Material == Enum.Material.Asphalt or part.Material == Enum.Material.Basalt or part.Material == Enum.Material.Brick or part.Material == Enum.Material.Cobblestone or part.Material == Enum.Material.Concrete or part.Material == Enum.Material.CrackedLava or part.Material == Enum.Material.Ground or part.Material == Enum.Material.Granite or part.Material == Enum.Material.Slate or part.Material == Enum.Material.Sandstone or part.Material == Enum.Material.Ice or part.Material == Enum.Material.Rock or part.Material == Enum.Material.Salt or part.Material == Enum.Material.Pebble or part.Material == Enum.Material.Marble or part.Material == Enum.Material.Limestone or part.Material == Enum.Material.Pavement or part.Material == Enum.Material.Glacier then

                    local rock = game.ServerStorage.bullethits.RockHit:Clone()
                    rock.Parent = game.Workspace.Thrown
                    rock.Position = result.Position
                    rock.Sound.PlaybackSpeed =  random:NextNumber(0.5, 1.5)
                    rock.Script.Enabled = true
                    rock.Sound:Play()
                elseif part.Material == Enum.Material.CorrodedMetal or part.Material == Enum.Material.DiamondPlate or part.Material == Enum.Material.Foil or part.Material == Enum.Material.Metal then

                    local metal = game.ServerStorage.bullethits.MetalHit:Clone()
                    metal.Parent = game.Workspace.Thrown
                    metal.Position = result.Position
                    metal.Sound.PlaybackSpeed =     random:NextNumber(0.5, 1.5)
                    metal.Script.Enabled = true
                    metal.Sound:Play()
                elseif part.Material == Enum.Material.Wood or part.Material == Enum.Material.WoodPlanks then

                    local wood = game.ServerStorage.bullethits.WoodHit:Clone()
                    wood.Parent = game.Workspace.Thrown
                    wood.Position = result.Position
                    wood.Sound.PlaybackSpeed =  random:NextNumber(0.5, 1.5)
                    wood.Script.Enabled = true
                    wood.Sound:Play()

                elseif part.Material == Enum.Material.Sand then

                    local sand = game.ServerStorage.bullethits.SandHit:Clone()
                    sand.Parent = game.Workspace.Thrown
                    sand.Position = result.Position
                    sand.Sound.PlaybackSpeed =  random:NextNumber(0.5, 1.5)
                    sand.Script.Enabled = true
                    sand.Sound:Play()

                end
                end

            if hitbox and hitbox.Name == "Hitterbox" then
                local hitted = hitbox.Parent.Parent
                --give the player a kill
                hitted.Humanoid.Died:Connect(function()
                    if humanoid.Parent:FindFirstChild("charactervalues") then
                        player.challengedata.VampireKills.Value += 1
                    end
                end)
                --[[
                if charactervalues:WaitForChild("Role").Value ~= "Vampire" and humanoid ~= user2 then
                    user2:TakeDamage(40)
                    game.ServerStorage.Dummy:Clone().Parent = playa.PlayerGui
                end
                ]]
                if charactervalues:WaitForChild("Role").Value ~= "Vampire" or humanoid.PlatformStand == true or humanoid == user2 then 
                    user2:TakeDamage(0)
                else
                    humanoid:TakeDamage(60)
                    torso.BloodSplatter.Enabled = true
                    spawn(function()
                        wait(0.1)
                        torso.BloodSplatter.Enabled = false
                    end)
                    torso.BloodSplatter.Enabled = true
                    spawn(function()
                        wait(0.1)
                        torso.BloodSplatter.Enabled = false
                    end)
                local sound = game.ServerStorage.Hit:Clone()
                sound.Parent = root
                sound.PlaybackSpeed =   random:NextNumber(0.5, 1.5)
                sound:Play()
                spawn(function()
                    wait(3)
                    sound:Destroy()
                    end)

                end
            end


        end




    wait(0.25)
        bullet_clone:Destroy()
        end
end)