I think it's just the gliders' personalities. You happen to have very independant gliders. I have thee gliders and the only one who will jump on me when I'm around in my boy, Chester. My girls couldn't really care less about me as long as I feed them. I've only had Athena a few weeks (and she was uber-crabby at first. She still crabs from time to time, but she takes treats from my finger and climbs on me sometimes), but I've had Dixie for almost as long as I've had Chester and she rarely even leaves her cage. She'll let me pet her, but she still tries to grab my thumb and bite it. When she does come out of her cage she really doesn't hang on me, she just scurries off and does her thing. It used to bother me, but I know I'm doing my best for them and that I'm taking good care of them and they're healthy. That's really all I can ask for. It sounds like you're doing a really good job and the fact they quit crabbing after a week is a testament to your care. Just don't get discouraged. It's not you, you have just free-thinking girls who would rather explore. That's a good thing too!