First of all, there are few stupid questions, so if you need to know something for the well being of your pet, don't hesitate to ask, definitely.
About the shed. Normally if the shed comes off in pieces it can mean a couple of things. The most likely is that the humidity was not high enough to help her have a proper shed. Even misting occassionally can not be sufficient if the air is real dry. If you find you have problems again, or if you just want to be sure and avoid the chance of problems again, you can set up a moist hide for her. Take a plastic container, like a butter or cottage cheese container nicely cleaned out, and put a hole into the side of it nearer the top where the lid attaches. Put either damp peat moss or damp paper towel in it and put the lid on and put it in the snakes home, being careful not to place it over the heat source if you have a UTH. The snake will go into it and stay in there usually till it sheds. These work GREAT! IF you use paper towel, though, you will have to remoisten it every couple days. Peat moss generally only needs its first dampening and it holds out fine. Also, make sure the material you use is DAMP and not sodden.
One other reason could be poor health. But if you are not sure, you can have your vet check your snake for parasites, internally and externally.
By the way, if you ever have hard sheds again, what you did was just right. Soak them in water by putting them into a shallow dish with a lid and a SMALL amount of water and leave it soak for a bit to loosen the shed and then use a cloth to wipe the shed off.
About feeding. The food that the snake leaves should leave an obvious lump in the stomach. Not so big as to make the snake look like he wouldn't be able to slither, that could cause a regurge from over feeding, but a definte, obvious sign that the snake ate. If you can hardly perceive that the snake ate after it swallowed its food, then you need to up your prey items size. You can either double the quantity of the size you are using or go up to the next sized prey. Always keep in mind that pinkies are not as nutritional as the mice that have fur on them, so if your snake can eat 2-3 pinks with ease, then it would be time to feed a fuzzy.
Hope this helps and good luck with all.
PS... I don't have time to check spelling so I apologize if there are any typos.