Kitten Beds I Have A 10 Week Kitten Why Does She Crap Under By Beds And In The Litter Box?

I have a 10 week kitten why does she crap under by beds and in the litter box? - kitten beds

First, it was in my bath mat beside the litter, at that time was under my bed with me some pills Worm 2 days away I thought, but after cleaning my carpet, I discovered more. Help. I need to close the doors in my room the whole time and she is alone at night.
I have another cat in the house. In addition, nail biting, but good. What can I do to avoid