not sure what the reason may be - everything looks normal on my end. You should probably contact an admin or a mod ... Marty doesn't seem to be around right now, though.
Have you by any chance changed your browser or any settings for it?
P.S. what exactly is the issue - do you not see the boxes for the bet amounts or does the system not accept your bets after pressing the "Bet Now" button? Or is it something else?