ETA: I'll add the specifics anyway. To answer what you asked: yes, yes and yes. In terms of schedule, activities and food.
She didn't like the schedule I had set up--too structured to me, since I had been taking care of mom by myself for a couple of years by then.
She thought that I should add different activities. Some of her ideas were good, but some involved being near large bodies of water and mom was deathly afraid of the water.
Food, well, that's a sore subject with this particular sister. She has her own ideas about food, such as, it has to taste bad in order to be good for you. And a long history of following that precept, which means that the rest of the siblings pretty much won't eat what she cooks, which hurts her feelings. Since we had such different tastes, I offered to cook for me and mom, and her, if she wanted to eat what I was fixing, but she had the option to make her own meals if she wanted to.
She also disagreed with many of my decisions about mom's health. We both agreed that less medicine was best. We both are into natural remedies and better nutrition. But we disagree on what natural remedies and better nutrition actually means in practice.