Joomla User Groups not updating - please help

Hi, I have Membership Pro 1.5.1 installed, and it is not updating the Joomla User Groups when I edit user plan/group settings in Membership Pro.

I have the Joomla Groups plugin activated, just wondering if I need to upgrade Membership Pro to fix this problem, or if it is due to something else perhaps?

More info:
Membership Pro is assigning Joomla User Groups correctly when the user signs up - they are assigned to Registered and FreeMember. I have the plug-ins enabled etc (OS Membership - Joomla Groups Plugin). The Joomla Groups I use are Registered, FreeMember, PaidMember, for access control purposes.

However when I use Membership Pro > Subscriber Management to change the membership plan to PaidMember it is not updating the Joomla User Group or the Jomsocial Group. I have tried putting in the payment amount and have checked the Plan Management settings multiple times for both Joomla and Jomsocial and I can't figure out why it is not updating.

Does anyone have any ideas, do I need to upgrade, is something conflicting, other??? Thanks guys

As replied via support ticket, the group of users will only be updated if he access to his subscription history , then upgrade his membership. If you simply edit the subscription record, change the subscription plan, the group of user won't be updated.

Tuan