Most of the time my cat looks indignant and even angry right after she poops in her litter box. She'll come running out of the bathroom (where her box is) and jump onto my bed and look at me with that indignant look, with pupils fully dilated. Then she'll race out of my bedroom and go down the hall, turn around and then come charging into the bedroom again. She'll do this one or two times. In about 30 seconds, she's back to normal.
Also, my cat refuses to poop in a clean litter box. Every time I change the litter (once a week), she will poop on the floor right by the litter box. She'll pee in the box but she won't poop in it. The next day, when she poops again, it will be in the litter box.
I rescued my cat a year ago from an animal shelter. She's two years old.
Have you ever heard of such behavior? If you have a cat, have you ever experienced something like this?