Lara, thanks. The lead guy is Lil' Rev. The two foot tap still seems like 144 or so to me, and it matches the strum pattern. However, if I look at other players feet, such as the other Uke solo player (James Hill) standing near the uke-less vocalist, I see half of Lil' Rev's foot falls and count 71 bpm. That seems to match the other players on the stage, where I can see constant foot falls or movements.
That makes it seem to me that Lil' Rev is strumming in sixteenth notes, with 8 down strokes per measure. That would mean that I have twice as many measures as I should.
Looks like I should have only counted one foot fall from Lil' Rev.
Thanks for your help. I've learned something. Much appreciated.