I had the exact same problem a week ago with registerfly. I tried to renew a couple of domains 10 days before expiration. Usually it's done in 5 minutes after payment. They got expired. After one week, usually they answred my trouble ticket questions about once every 3-4th day or so. They told me to cancel the transfer (?) and order a new renewal. So i did that. Now paid 2 times for each domain and it worked. Dunno if i want this stress next time i want to renew a domain.
I heard good about moniker also but it's double the price. Thats alot if you have many domains.
