Where you added your mom, if you scroll down just a bit further on the privacy page, there is a link called Bulk Profile Manager Changes tool. That is what you are looking for I think. If it's not possible to figure it out from there, make another comment and I or someone else will be glad to walk you through it. Good luck!
Use this form to add, replace, or remove someone as a Profile Manager on profiles that you are currently managing.
Use this form to add or remove yourself or someone else from many Trusted Lists at the same time.
About Profile Managers. http://www.wikitree.com/wiki/Profile_Manager