You should be more clear on this rule. I just looked and it only says it one place, and it's on the final page where you provide the address. You should add it to the bottom of your homepage, where you say max bet is two bitcoins. By the time somebody gets to the last page and get's the address they are just looking for the address. I wouldn't expect this is where you would see new limits.
You may also want to state that the 2.0BTC max is for STRAIGHT wagers. The way it is worded on the homepage it sounds like everything applies so I did not feel any need to seek out other limits you may have hidden on the last confirmation page. Just a suggestion
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Greg