Boo Hoo. There's plenty more Captain America's around. Who cares honestly.
actually vince you're wrong, there have only been 2 captain america's in the "real" marvel universe, steve rogers and a guy who replaced him in the late 80's/early 90's, that guy went on to be known as US Agent. The "other" cap's you're talking about are either from another timeline which comic companies tend to do for some reason, mostly to tell an imaginary tale like "what if captain america were...Black?" or "what if captain america fought conan".
I don't know what's worse me knowing this stuff or you pretending you know stuff about comics