A lot of speculation hovered about over some sort of rumour that this was going to wipe '
Alien Versus Predator' out of canonical status. Turns out it didn't. Just didn't bother referencing it. A future story could just as easily reconcile the two (presumably as being relatives).
Bishop 2, back when '
Alien 3' was filmed, was more
likely to have been human than android, but there was always the potential of ambiguity (a more advanced model designed for infiltration and related purposes). Ambiguity which '
Alien Versus Predator' appropriated for its own use. Nothing wrong with that. That's story-telling. Some people objected, but it's a personal like/dislike thing.
Of course, there also are those who disregard the AVP films as canon, but
also prefer Bishop 2 being a robot.
'Michael Bishop' was, I believe, the name Bishop 2 was given on some sort of collectible trading card, back in the 1990s. It didn't really have canonical status for obvious reasons, though, which meant the first of the AVP films was free to ignore it.