First off housing BP's together isn't the best idea, there are countless reasons not to. I would suggest that you put a divider in the cage so they can be housed separately.
But for now seeing that they are housed together in there do you only have 1 hide? You should have at least 4 (2 on hot side 2 on cool side)
I would look into replacing the thermostat that you are using, the zoo-med thermostats are junk. Here are 2 good thermostats:
Budget: http://www.amazon.com/gp/aw/d/B000NZZG3S
High end: http://spyderrobotics.com/home/products.html
I would also increase the humidity to 50%
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