The sound isn't quite right but I moved/swapped every speaker when I set it up and think this might be why.
I've never had it display more than one channel out of phase before. Its actually pretty normal.
I think I'll swap the cables on the surrounds, listen to them for a bit and re run YPAO. It should sound better or worse and I'll know, right?
I've already had one scare with my M80's (havent been able to run them for a month) so I'll be a bit more carefull this time around.
Home PC back up and running