Why are these lines either not running or running twice?

I am making a tycoon game that saves your data. I have saved and loaded the data but now when someone claims their tycoon, the code that looks through what the player owns doesn't work very well.

line 37 is either not running or is being overrited by line 62

for i, v in pairs(player.PurchaseFolder:GetChildren()) do
				for i, t in pairs(script.Parent.Parent.Buttons:GetChildren()) do
					if v.Value == t.Name then
						for i, o in pairs(script.Parent.Parent.Buyable:GetChildren()) do
							local str = string.split(t.Name," ")
							local str2 = string.split(o.Name, " ")
							if str[2] ~= "|" then
								print("1")
								if str2[1] == str[1] and str2[2] == str[2] then
									print(str[1]..", "..str2[1]..". "..str[2]..", "..str2[2])
									print("2")
									if str[1] == "Lights" and str[2] == str2[2] then
										print("3")
										for i, child in ipairs(o:GetChildren()) do
											if child.ClassName == 'Model' then
												for i, lights in ipairs(child:GetChildren()) do
													if lights.ClassName == 'Part' then
														lights.Transparency = 0
														lights.CanCollide = true
														for i, pointlight in ipairs(lights:GetChildren()) do
															if pointlight.ClassName == "PointLight" then
																pointlight.Brightness = 1.24
															end
														end
													end
												end
											end
										end
										t:Destroy()
									end
									if str[1] == "Walls" and str2[1] == "Walls" and str[2] == str2[2] then
										print("4")
										for i, child in ipairs(o:GetChildren()) do
											if child.ClassName == 'Part' then
												if child.Name ~= 'DropLocation' then
													if child.Name == 'Glass' then
														child.Transparency = 0.4
													else
														child.Transparency = 0
													end
												end
												child.CanCollide = true
											end
										end
										t:Destroy()
									end
									if str[1] == "Upgrade" and str[2] == str2[2] then
										print("5")
										for i, child in ipairs(o:GetChildren()) do
											if child.ClassName == 'Part' then
												if child.Name ~= 'DropLocation' then
													child.Transparency = 0.65
													child.UpgradeScript.Disabled = false
												end
												child.CanCollide = false
											end
										end
										t:Destroy()
									end
								end
							else
								for i, child in ipairs(o:GetChildren()) do
									if child.ClassName == 'Part' then
										if child.Name ~= 'DropLocation' then
											child.Transparency = 0
										end
										child.CanCollide = true
									end
								end
								if script.Parent.Parent.Buyable:FindFirstChild(o.Name):FindFirstChild('Activated') then
									script.Parent.Parent.Buyable:FindFirstChild(o.Name):FindFirstChild('Activated').Value = true
								end
								if t:FindFirstChild("Unlocks") then
									for i, button in ipairs(t.Unlocks:GetChildren()) do
										button.Value.Head.Transparency = 0
										button.Value.Head.CanCollide = true
									end
								end
								t:Destroy()
							end
						end
					end
				end
			end

I think you should be using datastores for this saving function?