Oh my Goodness! Question about first day

Hello everyone,
I just finished my first shift in a locked Alzheimers ward and have some questions. First a little background. I went to school and completed a CNA class about a year ago. I haven't taken the exam yet but finally decided to start working as a CNA about two weeks ago. I am new to this area so I don't know anything about the facility I am working for now. During my interview, which was a joke, I was told the aide to resident ratio is 19 to one. I must have looked pretty shocked because they reassured me that there are only two total care residents in the whole facility and most residents do a lot for themselves. Next I asked about training and was told I would orient on all halls and both shifts I would be working before I would start working on my own. Okay, now to the point. I oriented last Friday for eight hours with an aide who never worked my hall. I get a call Wednesday morning telling me I am all set in the schedule and they need me to start working my normal shift starting Thursday evening. I explained to the aide that does the scheduling I had not completed all the orientation yet and her response was, "our census is extremely low right now and we're scheduling three aides so you'll have all the help in the world." I started my shift and my first duty was to pass snacks. This was concerning to me because I know some residents have special diets, need thickened drinks etc. So I asked is there a list of who has special dietary requirements and they all looked at me like I was nuts and started rattling off a list of who can have what. Which would have been fine if I had known anybody's name. Then, it turns out that I have 15 residents to take care of and I have no clue what I am supposed to be doing with any of them or who any of them are. So I start asking questions which are halfway answered or not answered at all. There are three residents who are supposed to have two aides whenever they need anything done, because of being combative. Nobody would help. Thankfully they were fine. The night went on and things only got worse. So after this long winded vent my questions:
1) Is it normal to only orient brand new aides for one shift and then set them loose on these poor unsuspecting residents?
2) Is it normal for facilities to be less then honest when describing what level of care residents need?
3) Is it normal for residents to be covered in bruises? (This really bugged me and it seemed every resident I got ready for bed had some bruising on their arms and bodies)
4) Is it normal for residents to be put to bed in dirty clothes and with dirty faces, bottoms etc. ?
I'm not sure if maybe I am too naive and this happens regularly. The whole night I was so worried I was going to forget some crucial step and hurt somebody. Is every place like this?
Sorry for the long winded post. Thank you for any advice you have.

Anne