Lori, I admit I didn't read everyone's replies, so if I repeat anything, then its just goes to backup what someone else already said

Have you tried "Cat Attract" litter? I swear it works. When I use it, I have very few markings. I won't swear nobody pees where they oughtn't but I might get one or two little spots a week when I'm using the Cat Attract litter. Its expensive, but highly worth it. One bag will fill two small litterboxes for a week.