I'll answer this instead of Faladran since he's on a break:
"Hey, I have a question about the RMT forum, and I figured you'd be able to help me. I posted an RU RMT about a month ago, and that team has since been retired. That was also two RU stages ago. I was just wondering if it would be ok to post another one, thanks for your help!"
Yes, since you can post a new RMT every 2 weeks, you are allowed to make a new one.