Of course after typing up this post and trying for the past 30+ minutes I somehow manage to fix this: removed the tracks from my library, re-added them, the one with 156 went down to 0 but the 172 (that I actually listened to once) stayed at 172. Deleted the scrobble from my last.fm, removed from library and re-added again, and bang, it's at 0 now.
EDIT: I spoke too soon. It's at 172 again. Just listened to it and it went up to 173. But the other one is still at 1 after I just listened to it.
EDIT 2: I deleted and re-synced my play counts again, and now it's at 99??? This truly is bizarre.
EDIT 3: Not even 5 seconds later it changed to 100 without me even playing anything lol
EDIT 4: Okay, I'm at a loss. I've spent 2 hours dealing with this. This time, I removed the album from my library, played the dummy file (with the title, artist, album tags set to "Dummy" and the track and year set to 01 and 2000), paused, then stopped. Then I closed MusicBee, renamed the .dat file to x.dat.old, opened MusicBee, then synced play counts, which of course took about 5-10 minutes. Then I closed musicbee, opened it, waited a minute, then put the album back in my library and scanned it back in to my library. Bam.
385 plays. I don't even have any songs that I've legitimately listened to 200 times and I can't change the number because every time it syncs with last.fm it will restore 385. Please help.
EDIT 5: Okay. I've scrobbled that dummy track. Then I closed musicbee, deleted the .dat, and re-synced play counts. Now those tracks have the correct number of plays AND my dummy track also has the correct number of 1 play. God, it's as if musicbee is allergic to Adele LOL. It just works now.
If you'd like to look into any of my files for a potential solution for this bug, I can send them. I've saved all but one, meaning I've done 10 attempts.