Some players are experiencing similar issues with clans at the moment. We are aware of this issue and are currently working on a fix :]. For updates on this, check here: Beachhead Studio. We appreciate your patience through this time.
I don't think that anyone has since November. I know that I haven't and I don't see that changing.
This is weird. I can actually use the friends list from my iPad. I would recommend you try and uninstall and reinstall the app. Also, perhaps, try to login your account on another device then check if how it would work.
Yup 2e0f7301897e0da4d7eca3f657528add is right. You can also try to relink your gamer tag to your COD account. The App should show your Xbox or PSN friends. Make sure though that you are using the same email when you started your clan, if not you may be removed from your clan.