It seems there was a problem with the code for saving Rosters in the Roster Builder. The buttons to save just wouldn’t show up even if you had a User Site and were logged in. This is now fixed. The saving should work properly. If you see any other issues with it, please contact us so we can get it fixed asap.
Just a reminder that in order to save you need to not only have a username, but have signed up for a site as well as everything is saved to your site. Check out this post for more information on Roster Builder saving.