Are you saving and importing PokerStars tournament summaries as well as the hand histories? For the most accurate results we recommend that you have Tournament Summaries set to save in PokerStars (Settings -> Playing History -> Tournament Summaries) and set to import into PT4 (in Configure -> Sites & Import Options -> PokerStars).
Guide: PokerStars Tournament SummariesIf the correct prizepool isn't recorded then the value of the multiplier will not be right so for any tournaments with incorrect data you can
update the prizepool manually using the Tournament Results window. When the correct prizepool is entered then the multiplier stat will update accordingly. If the prizepool is specified in the hand history/summary file but it is not being automatically detected then
compress the hand history and tournament summary files for any tournaments which don't work for you and attach them to a
Support Ticket.