Every day they manage to ruin someone ELSE's pet keeping experience with incorrect advice! Curse the pet stores and their habit of hiring ignorant salespeople!

Yes, separate them ASAP into their own enclosures! Snakes in the wild, IF they do spend time together, have the ability to go their own ways. Snakes in captivity do not and should be kept one to a cage for safety, health, and sanity... of the snake and the owner.