"If you have a cat then you have probably had similar things happen to you" - for sure!
Any new object on the floor commands our cat's attention.
#MUST. SIT. On. It.
Mark his territory with his scent, I'm guessing... any suitcase, grocery bag, box, shoes, laundry, ANYTHING on the floor, he must sit on it.
She should definitely be present in every corner of the house at some point, cats are very curious. And yes, every new box or bag is Catalina's target.