Where did they go?

I sent a message to the tech support about this?

A lot of my groups have disappeared from the "My Groups" menu option. Maybe you have deleted them? There were about five "wii fit" groups...I think I joined them all.

Also I joined a private group FOBW, and had been using it. It's not in my list anymore.

And, finally, there was an "Intuitive Eating" group that apparently Mary has started over? because now no one is a member, and before several of my friends & me had joined.