Nice first submission. Cute idea.
Regarding the cat that uses the clean sand. You, as a cat lover need to understand that cats do not like to use dirty sand. So it is quite normal for them to use the box after you clean it out. A signal that you need to clean the box more frequently.
Regarding the scratching of things. You can help to avoid this issue by providing her with a scratching post and teach her how to use it.
I was happy to see your first post and found the story nice, but I was VERY disappointed that you did not provide your own photos of your own cat.
Personal stories are so much more appealing when the authors use their own photographs or drawings