I'm not really sure whether the mail about the 1:45 AM is authentic or not.... If I were in the office right now I would have confirmed it but unfortunately (for you people of course) I'm off and chilling at home.
So, it really doesn't hurt to be there early..... I know the waiting game might take its toll but it's for the best...... that is to say, I recommend reaching the test venue at 8:30AM or 9
0AM.
I'm pretty sure that there will be some serious issues which will certainly come up such as the the likes of confusion in test venue locations, timings etc. So, be prepared mentally for it.
Hope that everything works out fine.