I figured a way around this. Instead of giving gifts from the Gifts menu, I go to Friends and it will let me give my 6 gems from there! And all my friends are showing up as long as I don't do any updating from the Gifts menu.I've now got something weird going on with my friends in DV too. A couple days ago I also could only give one gem. This morning, only 1 of the friends i exchange gems with is on my friends list. I can see them in Game Center, but not the DV list. In DV, I can see 24 friends, but a lot are missing. Sorry everyone.