DD-A100GX Delay in audo with avi

I have a DD-A100GX stand alone player/recorder. I’m strictly talking about the player part of the unit today. I burnt some AVI movies onto DVD+R’s (verbatim) via my computer’s dvd burner. Most play fine with no audio delay, some don’t in the DD-A100GX liteon unit. All burnt with nero express. Note, that the one’s that don’t play right in the stand alone unit, to play right in the computer.