Okay, I got past that problem by going into the unattend.xml file by using the GUI interface through the MDT (right-click the task sequence in MDT, left-click Properties, click the OS Info tab and click the Edit unattand.xml button).

In there I had to go into the specialize section, locate that IE Welcome Screen option, right-click it and select the option to revert the change (or whatever it said). Even if it says False already do this and it'll fix the issue.