Yes, but had you read the rules before playing, then you would have known this rule was there, however ambiguous. You could have asked for clarification and wouldn't be in this predicament now.
Whether anyone agrees with the rule or its meaning is a moot point. Casinos, whether this particular one, or every other one on the internet, have the right to put in what ever rules they want and interpret them anyway they want to. When you check the T&C box you are agreeing to that.
Just a curiousity question, have you PM'd the Rep here?
I don't agree. If casinos had the right to interpret their rules in anyway they want to, they could almost practically lie to their customers if they wanted to.
And yes, I've PM'd CW's Rep.