I'm on Mondays CO89 and I saw the same thing, I'm in row 32 and then I saw 16 open up, so i tried to book and it does nothing. Funny thing is that if you look at the target in your browser it shows a function that indicates something should happen ( selectseat('16','k','bulk'); ) - but nothing happened.

15 minutes later someone took the window there so I figured it was a browser error. Nuts!