Since your just getting back into bunnies I wouldnt suggest running into getting 2. Especially if you were to loose one. You would have to be with the lonley bunny ALL the time or get another bunny get them spayed/.nutered and bond them. Wich is long process. The rreason yours picked on each other is I'm guerssing they werent nutered and being both male with raging hormons they attach each other no matter what even if theyy were littermates and grew up together.

I also answereed your pm for the other questions.