WebMD Veterinary Reference https://pets.webmd.com/cats/feline-herpes-symptoms-treatment#1

Sneezing, congestion, watery eyes and nose.... Has one of your cats caught a cold? It could be feline herpes, also known as feline viral rhinopneumonitis (FVR), rhinotracheitis virus and feline herpesvirus type 1 (FHV-1), and one of the most common causes of upper respiratory infections in cats. Many cats are exposed to this virus at some point in their lives.

House soiling in cats, also called feline inappropriate elimination, is the most common behavioral complaint of cat owners. Problem behaviors can be urine and/or stool deposited outside of the litter box, or marking behaviors. When cats urinate on vertical surfaces, it is known as spraying. Usually, the cat backs up to a vertical surface, raises its tail, which may quiver, treads with its back feet, and directs a stream of urine backward. Marking includes spraying urine on vertical locations; on occasion, a cat may mark its territory by urinating small amounts on horizontal surfaces. 

WebMD Veterinary Reference https://pets.webmd.com/cats/why-cats-sneeze#1

An occasional sneeze in a cat is normal and no real cause for alarm. Just as in humans, sneezing in cats is an explosive release of air through the nose and mouth - often the body’s response to irritants in the nasal passages. Sometimes, excitement or movement can bring on sneezing in cats.

However, if your cat’s sneezing won’t go away, or if other symptoms have cropped up along with sneezing, you may need to check with your veterinarian to see if treatment is needed.

WebMD Veterinary Reference https://pets.webmd.com/cats/guide/upper-respiratory-infection-cats#1

A cat’s upper respiratory tract-the nose, throat and sinus area-is susceptible to infections caused by a variety of viruses and bacteria.