Another reason why I won't be using RM. I'm not going to rewrite my rental agreement for anyone, let alone someone I'm paying to advertise that states they are not a party to the agreement between owner and traveler.
I'm wondering if they have some kind of cap on your account. Some processing companies only allow charges up to a certain amount (say, $1000.00 a time). Clever way to ding ya a little bit more.
I look forward to hearing what you find out.