What version of PT4 are you using? We did have an issue with live stats appearing for the wrong players but that was fixed a few versions ago.
Do you see the problem using a built-in profile or are you using a customized one?
If you're still having the problem in v4.01.23 please restart PT4 and reproduce the problem at a single table (or as few as you need to see the problem - the simpler the log file the better) and attach the PokerTracker4.log file from C:\Users\yourname\AppData\Local\PokerTracker 4\ (which you can access from the PT4 File menu) to a
Support Ticket along with a
screenshot of what you see and the hand history file for the tournament.
If you're using a custom profile please export and attach that too.