Thank you all for your answers.
I have read all their activities, policies, etc, so hope it will be ok, even in the nightmare interview version. It is very rude in my opinion to call you just like this without announcing you before, like they dis for you, Mac. And what about the consequences of this awful interview? They rejected/accepted you or you're still waiting for their answer?
For Sunny: I'm in the same situation as Mac, the unit that contacted me wasn't among my three choices. So I think they don't contact only the ones that have put them in top 3. They might look at your background and see that your profile suits a certain project of theirs. It is my case, I haven't even considered this unit because I had no idea they have some particular projects matching my profile.
So ya, don't give up hope and, taking in consideration the fact that you really want to work for this unit and that the lobbying "session" it is reaching its end, I I ware you I'd take the risk and directly call them. You have nothing to loose, in my opinion! Or send another email...
Good look to all of you! Finger crossed for all the lobbying and interview surviving!