The story in Resident Evil 6?
Shit's fucked up. Fix it.
The plot holes are as gaping as they've ever been, and it is as incomprehensibly told as anything else in the game, though the secret Ada campaign is designed to fill in the gaps. This is akin to handing me a mayonnaise sandwich and forcing me to finish it before giving me the cold cuts. You're a few steps behind Quentin Tarantino, Capcom, and you'd do well to realize that.