distribution list

I keep creating a distribution list of 20 or so contacts. 1. The “group” designation in contacts keeps disappearing with all the members, so it becomes an empty entry. 2. I’ve saved it as a VCF so i can reestablish it more easily. Now the VCF keeps losing the members. I keep adding them and it may work for one send after I save it to Em, but they vanish when I open the VCF to reestablish it the next time.  This is maddening. 3. Now I can’t seem to add any more members to the group at all. They go in, but when I save and reopen, they are gone. I’m running 7.1.30794.0