JD,
Coming back to an older problem report of "Doctor Strange (2D)".. When I select to either Movie Only or make an MKV with DTS to AC-3, DTS is not converted (correctly). The process "looks" good as BD-RB's doing it but in the WORKFILES directory, the AC-3 size is 2.50KB.
With MKV it fails to mux, of course. But Rebuilding BD structure doesn't fail and when playing back with Player or PDVD12..of course, not any audio.
Also, a friendly reminder. Checked "Role Models" extra yet?