Q.Can I merge member groups?
Yes. To merge member groups, navigate to Orders → Member groups. Select Move and select the member group you wish to merge this group into.
Click (Save) at the bottom of the page. On the confirmation page, you will be able to see that all members from the original group have been moved into the target member group.
Note that this does not delete the original member group. If you wish to delete this group, you can do so manually by clicking the (Delete) button for that member group on the Member groups page.