The other problem I saw yesterday is that I "got" Prestige" lvl increased while should not.
Other issue is that the players list is a little hard to analyse on game start. Any sorting or just showing who belongs to which team would be nice....
history is not working for me it's always empty ...
but good work man anyway 
edit:
player list seems to not keep proper ranks as well 
edit:
rank number is truncated so 30000 is being displayed as 3000
I think I've worked out why this happened. CELO always reports me as 1 rank higher than the official ladder does. Obviously ranks tend to vary by 1 or 2 positions as people around you win or lose, but when I started getting into top 10 ladders, I realised that this is a constant. So when I'm rank 1, it tries to rank me as one rank higher and fails.
Updated, I hope the levels work correctly now.
Also the the rank is fixed