We started Comic Vine with the rule that there is only one Captain America, Batman, Spider-Man, etc page. Even if the mantle has been portrayed by other characters. It's a super important rule because it simplifies our pages and encourages us to keep our articles concise. So G-Man and I had a mini freak out when we saw that someone renamed the Bucky Barnes page to Captain America (Barnes) and renamed our Captain America page to Captain America (Rogers).
There's been many more characters taking up the mantle of Captain America in place of Steve Rogers in the past and if we continued down the road of having multiple Captain America pages we'd end up with 6! And then we'd have multiple Spider-Man pages and Batman pages and on an on. I'll change the Buck Barnes page back to the correct name. I'm not unhappy with who ever changed the page names. But this is an important concept -- one mantle page -- here at Comic Vine that I want everyone to know about.