Why wont my createlabel function work correctly?

I am trying to make it easier by making a function that makes textlabels automatically

When I do this they are all together in one position.

local Plr = game.Players.LocalPlayer

local function Cc(Nme, Dsc, Prnt, Pos1)
    local t = Instance.new("TextLabel", Prnt)
    t.Name = Nme
    t.BackgroundTransparency = 0.35
    t.BackgroundColor3 = Color3.new(0,0,0)
    t.Size = UDim2.new(0,280,0,15)
    t.BorderSizePixel = 0
    t.TextColor3 = Color3.new(255,255,255)
    t.FontSize = Enum.FontSize.Size10
    t.TextWrapped = true
    t.Text = Dsc
    t.Position = UDim2.new(0,7.5,0,0+Pos1)
end

if Plr and Plr.PlayerGui then
    if Plr.PlayerGui:FindFirstChild("CommandsInterface") then
        game.Debris:AddItem(Plr.PlayerGui["CommandsInterface"],0)
    end
    local S = Instance.new("ScreenGui", Plr.PlayerGui)
    local F = Instance.new("Frame", S)
    local Sc = Instance.new("ScrollingFrame", F)
    local C = Instance.new("TextButton", F)
    S.Name = "CommandsInterface"
    F.Size = UDim2.new(0,300,0,300)
    F.Position = UDim2.new(0.5,-150,0.5,-150)
    F.Active = true
    F.Draggable = true
    F.BackgroundTransparency = 0.75
    F.BorderSizePixel = 3.5
    F.BorderColor3 = Color3.new(255,255,255)
    F.BackgroundColor3 = Color3.new(0,0,0)
    Sc.Size = F.Size
    Sc.BackgroundTransparency = 1
    Sc.Position = UDim2.new(0,0,0,0)
    C.TextColor3 = Color3.new(255,255,255)
    C.Font = Enum.Font.Arial
    C.FontSize = Enum.FontSize.Size14
    C.Position = UDim2.new(0,0,0,0)
    C.Text = "X"
    C.Size = UDim2.new(0,10,0,10)
    C.BackgroundTransparency = 1
    Cc("t1", "Shutdown  [Owners]",Sc,17)
    Cc("t2", "Clean  [All]",Sc,17)
    Cc("t3", "Fix  [All]",Sc,17)
    Cc("t4", "Disco  [All]",Sc,17)
    Cc("t5", "Music 'N'  [All]",Sc,17)
    C.MouseButton1Down:connect(function()
        game.Debris:AddItem(S,0)
    end)
end

Please help