Thus, I just pass off "Pegasus" as a mistake in the series. They do happen, contradictions that can't be easily explained away without major fan wanking. You just have to take it as an error and move on.
I feel like Rascals is probably somewhat problematic, too.
Indeed. Unless those children are very overweight, that excess matter had to go somewhere, but where? And how did they replace it when the crew were returned to their original configurations?