hello scratch n dent:
Your kitties are really nice looking animals.
I've been giving some thought to your problem.
We have a Manx cat. When it's litter box time to relieve herself, she plunks her bottom right on the litter before peeing. Although she doesn't get herself wet, it's been a wonder. We are using a grain base litter that I find absorbs the urine instantly, compared to some of the clay based ones.
I am wondering if your kitty is not doing the same thing and if she isn't producing a hole in the litter that's causing the urine not to flow away from her, then this might be the problem.
The other thing is, I've noticed some animals have the ability to relieve themselves a lot faster than others - in other words a faster pee flow - and maybe the litter is causing it to puddle underneath her. If it were me, I'd be trying another type of litter - perhaps one of the grain types - and see if that helps. Either Swheat Scoop or World's Best, or something along that line - if you are not already.
We've been using the Swheat Scoop for years and it has worked well for us.