No they won't merge. Think about it, both black holes would try to suck the matter that is so tightly within the other that it'd cause an explosion because of the force behind the two. Now it is possible that one would have more pull than the other, but I still don't think the outcome would be that good. With your logic the black holes would continuously, basically, suck each other in one another that would eventually cause an explosion...somewhat like the big bang. One would get sucked into the other that was sucked in first, sort of like if some one were to eat someone else alive and then having that person get eaten by the previously eaten person from the inside then it'd repeat. Now that isn't possible for two humans to do, but that's the best comparison I could make of what would happen with two black holes colliding. There also would be a chance of a black hole being within a black hole, which would suck in the matter that the outer black hole already sucked in, again later causing an explosion (Big Bang).
wow thanks dude i never really knew that and i'm not being sarcastic i never knew it