After spay Ovary left behind???

Anyone know if its possible to have your cat spayed and a Ovary was forgotten?? Is this common?

I will try to make story short, I have a female that is almost 3, she started to pee in the house about 1 1/2 years ago, i have tried everything that was suggested ( she is in her own room as we speak for a week to try to retrain)
I reached out top my Breeder last night and i told her the story, as i am describing her behavior she feels that its possible that a ovary can be the issue, or somethnig hormonal.
She has very maternal instincts, she carries beanie babies around the house as if they were her kittens, she has a few and she takes them to the food bowl in the morning and at night she plays w/ them and then takes them to bed w/ us. Its acutally the cutest thing, but my breeder feels that maybe not so cute.
Can this be possible cause of her peeing???
Anyone experience this behavior?

I dont beleive my other two males stress her out, she is the aggresor and gets most of the attention, and i cant figure out why she is doing this, i am racking my brain

I have heard of cats who were spayed, but had some ovarian tissue left behind (doesn't have to be a complete ovary). They came back into heat. It is possible.

ok, I don't know anything about ovaries/spaying or any of that. But I have to say the beanie baby story is just adoooorable! I had a male pomeranian who has had beanie baby's since he was a pup. He was in the crate with another pup when I bought him and was used to cuddling (and was the size of a beanie baby!) with someone else. So I got the petco beanie's they had of their mascots...the blue mew cat. I had to go back and buy like 5 of them cause he loves them so much, he still does. He cuddles it and licks it and tosses it around... it's SO cute!!!

luckygirl your right its adorable but maybe she does have a maternal or hormonal issue???