It's because of whats listing in the selections.txt (project files). Either go here
http://forum.ppcgeeks.com/forumdisplay.php?f=53
Or
if you just open one of them as your active project and deselect everything (even the radio buttons will deselect if you click on them) on the page and then save, it will create a new selections.txt for you... select that one from then on when you open up buildos and it will not show anymore. The modules are still there just not as listed in the selections file.