To make a long story short, I've had my baby for almost 2 years. She's pooped outside of her litter box almost every day since I had her, thought it was just a habit of hers that i'd have to live with forever. I tried everything and nothing worked. Well I just tried litterbox liners. (Basically a small garbage bag that lines it and you put the litter in.) My girl has not pooped outside that box in... it has to be almost a month now. I just wanted to share because I never tried it, thinking it would be more of a bother to her and it would make her not like it more than she already did. But for some reason, those liners just did the trick. So if anyone's having problems, there's my suggestion.
Have a good one!