Wgm Mac Address Not Showing In List


I have recently run into problem with WGM when there has been a mistake made when adding computers to a specified list. When the computers are removed from that list and then added to another list it trashes the list they were removed from. You get a message like Got Unexpected Error Error of type -14136 on line 432 of ComputerListPluginView.mm. Also now some of the MAC address are not showing in the list, but If I go to Inspector I can see the MAC address that are related to the computer. If I try to add the MAC address to the comptuer in the Computer List I get a message that you cannot modify this computer because it belongs to this list or another list. Does anyone know how to fix this problem short of deleting the Computer Group and recreating it?