Hey Camo,
In regards to their size, it would all be relavent to the size, amount and type of food you and also how often you are feeding them. 6 months will make a huge difference in size between a feeding and non feeding animal. I would increase the feeding on the female if everything else appears normal in her behaviour. If not, it may be worth a trip to a good herp vet to have her checked out.
Was the second female kept in an enclosure that had nothing for her to climb on? Lack of furniture in an enclosure, such as no branches to climb on, can cause them to have weaker muscle tone and can eventuate into a loss of control, like in the situation you have mentioned. You don't really want to know what the worst case scenario could be do you??


Cheers
Daz