Is PokerTracker 4 displaying import errors for any of these hands? There is an issue with a some hands which will be resolved in the next update but you can send us your sample in a
Support Ticket so we can verify that. There are also reports of hands being missed and these will not generate import errors because the ACR software has an issue whereby it doesn't save all hands played so there would be no way for PokerTracker 4 to know about those particular hands.