I would be inclinded to have her tested for any sort of infection and if she doesn't have one then I would assume that the pee'ing in the house IS a behavioral issue. Submissive pee'ing/leaking not included.
Just a thought, (which doesn't apply to her "leaking" or sumbmissive peeing), but what product specificly are you using the clean the soiled areas with?
You need to get a cleaner that removes the pheromones that are left behind after a dog potty's in a particular spot. You cannot smell these but the dog can and it attracts them back to that spot, most cleaners do not remove that specific odor. If you are noticing her pee'in over and over in the same general areas in your home that is likely the problem. I use a cleaner I buy at petsmart called Get Serious, I LOVE it. In fact I just used it in a rug doctor steam cleaner and cleaned my whole house with it. Really great stuff. I know there are others as well, I think PetZyme is another one. What you really have to be careful of is using products that contain amonia of any type, I have a friend with a carpet cleaning bussiness and he says windex is an awsome carpet cleaner for stains and such. However, the amonia would also attract your dog to that area to potty.
In addition to the possible pheromones that are attracting her to specific areas of your home it is likely become habit for her to potty in those areas. Sooo, even after removing the pheromones you will still have to watch her closely to make sure she isn't going back out of habit. :banghead:
Another issue that jumps to mind is that you mentioned that you are finding dired up areas of pee or puddles. So she is going out of sight to relieve herself. How did you go about housebreaking her as a puppy? That could also have a lot to do with the issue. Some people inadvertantly teach their dog to go hide in order to relieve themselves. When you potty trained her Did you go out in the yard with her , or walk her on a leash to go potty? Do you do it now? What happened, (what was your response) if you caught her pee'ing in the house?