Sharky
Steve and Natalia are... Divergent. They're ours but not? Best I can guess it seems like something happened in our timeline that split it off from their's. People are mirrored, events are similar but... not the same, precisely.
Also, heads up, Natalia might uhm... only recognize you as the Winter Soldier so... just going to rip that one off like a bandaid. No idea what's up with that seeing as Steve was surprised by that as well. Not that I asked too many questions.
If you couldn't get a slight grasp talking to that other Hawkeye, there's at least 4 versions of possible 'us' going around. Unless you include the ki[...] Though the only person who seems to have been keen on doubling herself up so far is Romanova. There's Natalia and Natasha and it is, well, at least they don't look the same.
Effectively, things are about as screwed as you could wager in a giant floating head in space.