Without the tournament summary files it isn't always possible to correctly determine the tournament type or results. It can usually be done for single table tournaments, but for multi-table tournaments there is not enough information available in the hand history files alone.
Please refer to the
PokerStars Configuration Guide to make sure that your tournament summaries are configured correctly for future tournaments.
For your existing tournaments you could try requesting an "audit" file which you can import into PT4 using "Get Hands From Disk" and that should be able to update most of your results information at least. (Search for 'audit' in the
PokerStars Configuration Guide)
Alternatively you can update the results manually using the
Edit Tournament Results window.