Seth voice is not properly restored for a scene. Or maybe every scene I downloaded with a male had a female voice from the beginning... Also - with VAM's builtin mouth movement - what is now better to use? VAMs or VAMMoans?
Never had any issue restoring voices : )
Maybe you should contact the creators of said scenes?
The mouth movements for VAMM are based on VAM standard systems. I only provide the preset to have a somewhat "optimal" results. But there is no specific engine controlling the mouth for VAMM.