Seriously, is this a real thread ? The questions are so unbelievable it has to be a joke .
Regarding the @ mentions, you may have to click the option in the little menu that loads as you're typing so that it knows which user you are trying to mention. I think someone else may have already suggested this.
For example, if I type in @Marwood & I and never click the menu option, it might not be treated as a mention. Which kind of makes sense, because what if there was also a user named "Marwood"... how would it know that I wasn't trying to mention him instead of you?
But if