The only molly I actually picked out an individual ended up being the only female I got. I didn't want to be a pain since others were waiting, but I should have so I could have gotten one male and three females like I wanted. Oh well.
Anyway, apparently I picked well (she was obviously pregnant) because today we have babies! I've only seen two at a time, but I'm not sure whether or not they're the same two I keep seeing. I tried to get pictures.