Yes, he clearly wants to be your only bun. I think you should print this post out and put it on your fridge, so every time you get the urge to have another bunny, you can read it as a reminder!
Seriously, except for things being so different for Itty Bitty, I think you have finally resolved it to the place you need it to be. Actually, had Itty Bitty been in a good home with the woman you gave him to last week, he never would have come back to you, so in that respect you just continued to try to re-home him. I hope someone wonderful finds him now and gives him lots of attention – and who couldn’t love a little bunny as cute as that?
Someone else here said your hubby was just trying to do something to make you happy, and I agree. I guess the poor guy upset you badly by removing Itty Bitty, then had a choice of seeing you in back pain or in emotional pain. Tried to fix it with a 3rd bunny. Sigh. Very stressful, but better for you now.
Bunnytowne, Mr. Bunnytowne, and Cotton makes 3.