It sounds like an issue that we've seen twice with them. They'll be routing an entire block for us just fine, but traffic for one IP will get stuck in a routing loop and never makes it to us. The one time that it happened the technician ended up doing a few soft clears on their BGP, and the other time it was fixed before we could contact them about it..
It always seems to happen after we have a problem with our connection to them..
