I have a group that doesn't seem to be keeping members that I have placed in. It seems like I can add the members one day and they will stay in place for that day. The next day the members I just placed in, and were in before I upgraded to 2014, are no longer on that list. I have tried to Synchronize the group and the user to ensure I didn't miss anything but this is the second day I had to re-add.

What do I need to do to get this to stay once saved?