Problem with automatic lip sync

I am trying use the automated lip sync in TS v3 but am having a problem.

TBS will let me load different mouth drawings into the same column in the exposure sheet, but won’t let me name each mouth element separately (instead of mouth-A, mouth-B, it changes it to mouth-a-1, mouth-a-2, mouth-a-3)

If I do a different mouth drawing on each vertical column in the exposure sheet, then when I apply lip-sync mapping, TBS adds a new vertical column in the exposure sheet, with all the different mouths labeled, but with the drawings missing.

All I have been able to do is drag each mouth drawing into the correct frame to match the lip sync map.
Any suggestions would be appreciated. Thanks.