I wouldn't worry too much as long as there isn't standing moisture in the tub or on the sides. Plus the Acurite can be a little off. I've had 2 Acurites of the same model give me two different humidty readings. (were 10% off from each other)
I personally keep my humidity in the 60-75% range.
Condensation on the side is an indicator for more holes or smaller water bowl. (this doesn't include when the snake urinates and what not because condensation will happen with that)
Beautiful rack, btw.