Limit Group Creation Option

The Limit Group Creation (BuddyPress) option in Pro Sites doesn't seem to be working for me.

I have set the Limit Group Creation option in pro Site settings.

I have a user who is subscribed to my Pro level (named supporter).

But when that user visits the BP create group option on the main site, I get the message "Upgrade to Supporter to access this feature »"

When the user clicks this upgrade link they are taken to an account page for the main site (and not their subdomain site) and so get the message:

"Sorry, but you do not have permission to upgrade this site. Only the site administrator can upgrade their site.
« Choose a different site"

There are two issues here:
1 A pro user is unable to create a BP group despite the option being set and
2. the upgrade link incorrectly takes the user to attempt upgrade on main site.

Any ideas?