It's a known issue: 10168: Playcounts aren't calculated consistently between MMA and MMW

This and the lack of 10160: Real PlayHistory synch will make this unusable for me. Haven't even bothered testing further after discovering these two downfalls.

I had my tablet in the car, and played two tracks via Bluetooth. After the 2nd track, I let the next track start and then hit Pause, turned off the car, and brought the tablet inside. A little while later, I started using the tablet, but not MMA. (There are no BT receivers in the house, just in the car.)

Then, an hour later, I sync'd to MMW. MMW showed the Last Played correctly for the two tracks I'd played, but also showed the next track as Last Played about the time that I first turned the tablet back on.