IE bookmarks reversed themselves and I cant put them back

vbimport

#1

today I got home and logged on, and my bookmark menu acted funny and now the list is reversed, I downloaded up dates from microsoft for my windows XP Pro service pack 2, now it wont let me drag them back into the order they were in, anyone know how to fix this? even deleting them and re entering them puts them right back into reverse order, is this a virus?