Thank you, KMG.

I actually saw that here....
http://ball-pythons.net/forums/showthread.php?201740-How-to-Setup-a-Glass-Tank-%2820-long%29-With-Pictures!

..But I just don't understand it all the way...

In SerpentMerchant's thread, as I look at it again, he says pretty much what you just said. Place probe under (outside) tank, place thermometer probe inside the tank.

In a way, would it be inaccurate to say that it really doesn't matter what temperature the UTH is? It seems that what's important is the temperature he actually feels on the glass, so that's where you make the adjustments. So why not just place the probe from the thermostat inside? I feel that there may be something I am missing...

As far as the thermometer, any thoughts on the infrared vs. a probe as far as accuracy?

Also, you mentioned that if I had stuck the UTH pad to the tank already...I did stick it, and then I unstuck it, moved it and stuck it back. I understand the "stickiness" will go away at some point, but I am willing to give it another reattachment to fix the probe where it needs to go. Do you think it would be a problem to move it at this point?

I know I'm asking lots of questions, but please bear with me

I really appreciate your comment about the thickness of the substrate. I didn't know if it was okay for the snake to directly lay on the glass.

Thank you for the explanation of the UTH construction, as well. From that, I can see how the readings make sense.