I used to have a 5 user commercial licence but 2 days ago Nick Mason of Atlassian said that I now have a ten-user license as that's the minimum tier available in OnDemand, so why can my 6 User not join. He gets the invitation email but when he clicks the signup button, it says:
We cant sign you up at the moment as the user limit has been reached. For futher assistance, please contact your JIRA admininstrators.