Nope, not complicated at all. But u have to think man, they arent gonna randomly put a guy in the picture who looks JUST like Loki, it was just be bad on Hitch's part....and NOTHING is bad on Hitch's part

Seriously though, look at him, its obvious the angles he is in in those two pictures, he was put there for a reason. they could have put any of the other SHIELD agents there, yet Hitch decides to make an agent who looks JUST like Loki???
But I do think you brought up a good point. Perhaps we see Loki how he really looks, and to them he looks different every time. Orr......maybe just the fact that he can reshape reality, he made them remember a different "Gunnar". I mean, wouldnt Brian Braddock's father be like "wait a minute, i dont remember this guy on my team, or any of these other scientists that supposively worked on the Thor design!!!"
Also, one of my gripes....why does Fury just assume that Cap isnt really Cap, instead of thinking he is the real Cap, just gone bad. I mean, as that guy states they put a PINT of tetrotoxin into him, yet he is still able to fight like that? Or even better, how u explain a normal man ripping a tombstone like that??? And does Fury also think Tony was involved in a fake cap?
.... I guess it just doesnt make sense to me why Fury would turn on Rogers like that, yea, his good friend was "killed", but shouldnt he be a little bit more logical than that??
Also, where did these other Reserves come from??? Also, I wanted to hesitate on saying this, because then someone could say my Loki theory is wrong, but was it just me, or did one of those reserves look JUST like Lieberman??? Maybe Fury faked his death, so that he could use him for his grander plans....?? I dont know, just my random thoughts!