Upgraded from Vista Enterprise to Ultimate, Outlook 2007 problems!

I recently upgraded from Windows Vista Enterprise to Windows Vista Ultimate
and saved my outlook 2007 files as a .pst file. I imported it into Outlook
and now all of my business appointments show up as not only business but also
anniversaries! Not only this but now all "school" appointments show as both
'school' and 'vacation'. 'Personal' shows as both 'personal' and 'business'.
Does anyone have a clue as to what happened? How can I get things back to
normal??