Next time you are close if possible set up a care conference with the staff. It really helps to let them know how you feel and what you expect. They in turn will let you know what they can and cannot do.
I agree with Louisa being the next of kin you do have more power. I had poa just to make things legal when I was going through this. We used it mainly for papers that needed signing.
Could you take over the POA? Just another idea.
Maggie