Pom repeatedly pees and poops around house after just being out

by Melissa
(St. Catharines, Ontario, Canada)

We have a 1.5 year old Pom, he's the sweetest dog. He loves our toddler, loves to be brushed and play with other dogs. He seems generally happy. He will sit,stay, only where he's comfortable. He doesn't like car rides, large objects like laundry baskets, cars, vacuums, carrying anything bigger than him. And often he barks at my husband - I think because my husband gets mad at him for peeing and pooping around the house. We will take him outside to do his business, he will, and when we come inside, if left alone, he will pee on the side of our bed poop in the same two spots or pee on the cat tree. Is he being spiteful? Can we fix this? Is he unhappy and we don't know it? How can we fix this? We tried umbilical training with hi, but I feel bad having him attached to me all day or locked in his crate. Please help!