I'm not sure if this has been mentioned or not in this thread yet, but there seems to be a rounding issue with some bets.
I placed this one today:
Football Team Sanders
Team Rice Under 90 4 hours from now -107 ฿ 1.07 ฿ 0.99938
Payout should be ฿1. It's only a ฿ 0.00072 (~$0.60) difference, but that adds up over time and is a bit annoying.
You know, I have noticed this lately as well. It's off by a little amount but if there is no explanation and bitbook is doing this to everyone it would add up for bitbook and again I'd question their honesty.