Okay I'm re-watching again, and I'm on episode 2.25 when Mona was "UnmAsked" as "Original A", and I came across something that proves Mona was NEVER the original or Uber A. She was merely a distraction. As she is driving Spencer to Lookout Point, she was telling Spencer that her motive for being A was because the liars stole Hanna from her. Hanna was her bestfriend and she wanted revenge, HOWEVER, when the A messages started in season 1, Hanna wasn't even really friends with Aria and Emily anymore and barely spoke to Spencer. There is no way she was A. I'm still convinced Aria was the mastermind behind it all. This gives such hope for many theories out there. I'm sure others have noticed this and probably even made a thoughtful theory about it, but it struck me watching just now and I had to vent about it.