I decided to move my very pregnant molly to the breeder box yesterday afternoon. By that evening she had aborted her babies. I guess the stress from being moved was too much.

Most of the babies were still under-developed. Three babies looked to be fully developed, and of those three, only two were alive and swimming around.
I removed the mother back into the tank. I also put the two live babies into the tank to grow up. They have plenty of hiding places with all the shells and plants I have in the tank.
I'll keep ya'll posted on the development of the two babies.
Next time I'll just let the babies be born in the community tank.