Manual Groups

I would think not since it’s a manual group. Are you saying you added a manual group to an automatic group and asking if the manual group will be updated? 

I created a manual group and populated it with users in an automatic group. I wasn’t sure if when the automatic group updates, it would also trickle down to the manual group. 

the manual group should remain stable since it’s not actually updated by anything other than an admin adding or removing users. You can also add ad-hoc users to an automatic group if needed. Sometimes the criteria just doesn't work 100% so adding 1 or 2 user to get the group fully completed is easier than playing around with the criteria and sets, etc.