Caroline, when Sally runs around like crazy, I think it's because she has so much enery to burn off. Fister does it sometimes in late evenings, and aslo when he has been to the litterbox. Perhaps a sign that he is happy he has done his business. LOL!

Concerning the pee on your mother's chair, I think she does it because she feels lonlely. That is the only way she can tell she's not satisfied with the situation. You and your brother have moved out, so she misses the company.

Is she an inside/outside cat? If she's only indoors, it's very unlikely that she has fleas. If she does go out, it's a good idea to give her a few drops of Advantage once every month.

The peeing and pooping could also be something she needs to see a vet about. Make sure to keep an eye on her when you visit. She will be so happy to see you!