Yes, gm, you are correct.........bad syncing of audio and video. I feel like a dummy for not spotting this when we watched it the first time, by looking more closely at motions of the other musicians. I recorded the show, so we rewatched it, carefully. It just never crossed my mind that they would show an hour long concert on Austin City Limits and it would be synced poorly. But it certainly is. You look closely at the drummer and it is definitely off.
I watched it on satellite (DISH) and I am just wondering if somehow the audio/video feeds over satellite got out-of-sync somehow. I doubt it, because I haven't seen this problem before; but maybe.
Anyway, my fault.
On the other question of processing, the vocals were very reverby and sounded heavily processed to me. Possibly the acoustics in the concert hall were terrible and they didn't deal with this well when the show was recorded. I don't know.
Sorry for the bad info.
Mike