As far as the analog ones Mike they can be off quite a lot, sometimes as much as 10 degrees so I've heard. The digital really are best.

For your humidity you can put in a smaller water dish with less surface area and make sure it's on the cool side of the enclosure. Since it's a plastic enclosure you can add a lot more holes into the sides and lid. You can move the enclosure of a room with better air movement (as long as it's not in direct sunlight or drafts). Make sure that the snake cannot tip over it's water dish, that will only make the humidity issues worse.

As far as temps, can you turn up the UTH a bit more? Is the house very chilly?

Two hides, one per end, is usually best.