I was under the impression that it locked on to them because they were in Tony's Civil War files. That doesn't seem like that far of a stretch. It does seem silly that no one would think to add the villains to the list, however.
And this is one of the reasons I don't read DC comics. I picked one of the Big Two because it seems like they bounce off each other a lot, which doesn't really surprise me since there are only so many ideas, and I imagine a lot of the creators probably do spring ideas off each other in their secret comic book writer lairs.