Problems syncing calendar between ipod touch and computer

Just today (5/7/12), when I sync calendars using iTunes between my ipod touch and computer, changes I made to my computer calendar are added to the ipod touc, but changes I made to my ipod touch calendar are not added to the computer calendar. I'm not sure if there was a software upgrade today for the ipod touch. Perhaps it's a bug? If so, anyone know the fix? I did open iSync and told it to reset sync history, but it changed too much data.