LOL. I know all too well how you feel about the pellets. I've got four rabbits (split into a pair and two singles currently) and one of the singles is on a serious diet for being chubby (basically, a no-pellet diet with lots of veggies and hay). They're all in the same room and I know that Nala knows darn well when I'm feeding everyone else their pellets... so I always end up giving her 1/2-1 tbsp of pellets so that she doesn't get jealous. Based on the amount of pellets you feed and how you give water, I'm at a loss now... to be honest, I'm having the same issue with Nala (the bunny on a virtually-no-pellet diet) - everything should be in order, but her poops are still small.
If you don't get the answer you're looking for from this thread, try messaging JBun - she puts us all to shame in health and welfare matters.