Hi, I'm a BSN student but I'm also a CNA/MA vet, and have lots of experience in Ward/Clinical settings. Reading your post troubled me, specially since you cant really expect to take good care of pts if you are doing more than 10 pts her shift. 30 pts is unthinkable to me, and is a major blemish on the professional nurses who supervise you, since they really should know better. I would assess what they do in their free time, because if in fact you are ALL running amock, then I'd get on the supervising official, maybe even go beyond him/her. Remember, CNAs have a voice, you have rights just like the nurses do, you're not going to make a friend, but you should seek to nip this kind of an issue in the behind quickly, like you said, pts are at stake. On the further note, it is a job of a nurse as well as a CNA to do ALL those things you do as well, I/O,VS,BS,Bedpans, bedbaths, etc, Or perhaps some of them need to be sent back to school.
I'm not trying to rouse a passion for rebellion, but I am saying be smart, I think every system has leniency towards those who "just do that right thing" once in a while!