I don't see any song with a blank title. I've just sent you a reduced version of my library (including pdf files) in both devices, in case you want to take a look. Restoring both backup files to a PC / Android device and launching a sync PC > Android should replicate the problem.
The .msb files include settings for each devices, in the log file you can see which are the files being sent over and over again. Db files are also included. Hope it helps.
The .msb files include settings for each devices, in the log file you can see which are the files being sent over and over again. Db files are also included. Hope it helps.