Password is invlaid

I just tried to log in to a site that I have already set up and it forced me to update all of my login information. I submitted an incredibly secure password (courtesy of 1Password) and it spat this message back at me:

Password is invlaid[sic]. Must be between 7 and 15 characters, start with a letter, contain at least one number, and cannot match your UserID, nor contain any spaces and special characters.

The funniest part? After I finally satisfied the site and it accepted my new password, it wouldn’t let me log in with the new information. So how did I get back in? With my old information! Then guess what happened? It asked me to update my account information.
Later. Rinse. Repeat.
Moving on now.