The snakes really should be separated. BP's do much better when they live alone. If by chance one of them is a male and one is a female you could end up with unwanted breeding. What would you do if you all of a sudden had eggs and no incubator? If you managed to keep the eggs alive how would you support the extra snakes that you now have? There are many reasons that BP's should live alone. Do what you can to get them separated into their own enclosures.