BD media is different than DVD media. Blue laser vs red laser. Just because the backup is made to fit on a DVD DL disc doesn't change the type of backup. If burned to DVD media, it is AVCHD. To BD media, it's BluRay.
I have tested several full backups that, when burned to DVD media, did not play correctly or without audio for the main movie, but when burned to BD-RE played perfectly.
I do not believe AVCHD supports HD audio, so the backups should have their audio converted to DD AC3.
Following this thread from the beginning, almost one year now, there has not been many consistent full movie backups reported that play to BD5/9 media on standalones.