Welcome to the wonderful world of LTC 'management'.
Dang, it seems like even after eight months out of the job I keep finding ways to get angry at the place I was working before, and seeing your plight really torques me off to the maximum. I'm mad at them again, and they had nothing to do with the situation. (sorry, that was completely off-topic.)
Most likely, the above poster is correct, those two nurses have been at the nursing home for a long time and are running the show. Most likely, the administration thinks that they are angels of mercy, and hasn't seen the ugly/lazy/cruel side of them. Also, they most likely have the corporate staff buffaloed as well, I'd be horribly surprised if they didn't.
Unfortunately, this is a reality of the system in LTC. Management and the Corporate Office see the patients as cash, and the floor staff see the patients as people. The unfortunate thing is that you will never really be able to convince (upper) management (in your case) that those patients are not cash cows. If you systematically work through your staff and question them you will also most likely find that they are assigned too many patients to be safe, that they are most likely angry and frustrated with their jobs, and that they feel trapped because they don't know what job they can go to because of the family life that restricts them into that role (babysitting and things of this nature.)
Unfortunately for you, if you go too far into trying to fix the problem, the most likely thing that will happen is that you will get fired. Of course, by this time you will have a large bruise on your forehead from beating it against the brick wall of LTC as well, which your insurance won't cover because it happened at work. The problem with LTC is that the system is broken. It is so deeply malfunctional that one person cannot change it, and that if any one person tries they will eventually lose their job because of the pressure that they put on the established system.
The only way that things are going to change in LTC is legislatively, and it's going to take intense lobbying by the nursing community to get anything changed because the owner PACs are so strong. From the ads you see by lawyers on tv, you've gotta know that things are broken, but repairing them is beyond one person's ability to do.
Best of luck to you! Sorry I'm so pessimistic on this subject, but I spent six combined years working in LTC and this is how I see the situation.