Whoa I didn't know about Darth Vitus, that's awesome! For those of you who don't know, here's the wookieepedia page on him: http://www.starwars.wikia.com/wiki/Darth_Vitus
And why wouldn't the presence show up in all of the phases of time instead of just those two 2nd and 3rd pasts? And why is it so much more difficult to target than the other aggro targets? And why does it show up as an enemy on the map (a little red dot) when the other aggro targets do not? I tested this with the Laser Focus in TC, it doesn't show up on the map. The point is that the placement and features of the unseen presence seem a bit too deliberate to be nothing.