KPerry
Do you have a pan envelope on the bus? Do you have a pan offset on the bus?

Thanks "K".  Yes and no.

Bristol_Jonesey

Paul G

Slugbaby
Just a guess, but are the Vocal tracks mono?
If they're stereo but only recorded on the left channel, it might cause this panning issue.

Thanks Matt.  Yes, they're all mono.


Paul

Are all the vocal track interleaves set to mono?

Thanks Colin.  Yes they are.

OK, here's what happened.  I went into the project this morning and now it appears to be working.  The thing I didn't try, (previously), was closing and reopening the program and/or rebooting the computer.  Very strange!  I've had intermittent envelope issues for years but it's usually editing problems, (the edit tools don't work).
 
This project had two different sets of vox clips that I wanted to swing from hard left to hard right.  After fighting the first set for a while, I ended up just coping the vox clips and routing them to two different buses.  The other was a short clip used to create an echo and I wanted to slap it from hard left to hard right very quickly.  Never did get that one to work, (the other night).  This morning they both work.  I don't know....
 
Thanks everyone!
 
Paul