[Ben Jenssen]

To me, this sounds like PT is not handling the file format right, at least when reopening the session, and it plays the whole file from the start on every track.
If you had selected all clips on all tracks when you had it working in the first place, and selected "Consolidate", PT would have made 16 new wav files, and those would have opened fine next time.
So, as a fix, I suggest you do the process again, new session, import the x32 file, consolidate all 16 clips, close session, open your session with 16 kick drums and import your newly created 16 wavs from that session's Audio Files folder. Select Copy Files in import dialog.