Yes - in this particular song the tempo is constant and I can see that the first two verses don't follow 4/4 timing. In order to get ACW to match up the very clear beats I changed the time signatures for the first couple of verses over to 5/4 and manually adjusted the positions of the bars on the blue lines and by listening to the song. After doing this for the first couple of verses, I could hear the song change to a new pattern that now followed 4/4 timing perfectly. In fact I did not even have to make any adjustments to the next four verses since they all matched perfectly up using the identified tempo. Then the song switches back to 5/4 again and the pattern repeats.

There may be other ways to deal with this thing, but the existing docs that I have read seemed to say that adjusting the time signature is the way to go work with songs that add partial measures and such. The trouble is that this works fine in ACW but I can't seem to get Biab to then do something useful this info. When I get back into Biab, I suspect now that I am support to only use certain styles that can make sense of this odd time signature switching. I don't see any styles that say "any time signature". Is that even possible?

Again - I want to emphasize that I am have success getting ACW to correctly match the rhythm of the song using a variety manual adjustments and changing time signatures. I am trying to stick to songs that don't actually change the tempo of the song as they go, but that's next on my agenda and will further complicate things I am sure.