Too funny! Sorry , it takes awhile to type all this out...
So I suspect we are going to need a retraining period for your guy. This is gonna involve some commitment on your part, and possibly a temporary change in his lifestyle while you are not around. Meaning if he is free in the house and peeing on stuff while you are gone/not supervising him, he is going to need to go in a crate or a pen temporarily, at least until he is potty trained again. The problem with letting a dog loose when you aren't home or aren't able to supervise is that every time they do go potty in your house, they are giving themselves a positive reinforcement because it feels good to go pee when you have to pee, so they pee on your rug, and it feels good, so they want to do it again. So we have to eliminate their chances of peeing on the floor or wherever they are peeing by confining them to a small area when not directly supervised.
So any time you are not home, you need to have him confined, and any time you are home but can't watch him like a hawk, you need to have him confined. When you are home and he is loose, you need to watch him like a hawk. I recommend putting him on a longer leash and attaching him to you or the chair you are sitting in so he can't wander off and pee. You want to watch him for signs he is going to pee, such as wandering off, sniffing around on the ground, and catch him before this happens! Also, take him out on a regular schedule and reward him when he goes potty outside.
Here is a brief overview on the potty training plan:
And this link is a downloadable guide: