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

Well when you execute the function from line 44 to 48 you set the argument Pos1 all to 17