They're not wierd, they have just adapted to a situation you placed them in (not slamming you, just being honest here). Given a preference they would have very likely stayed away from each other, except to breed, as they are a naturally solitary creature. Now that you are more aware of their needs, I know you'll address the housing issues and do your best for your scaley buddies.

Btw remember when it comes to housing, if you end up staying with tanks to check craigslist and ask your friends. You'll be amazed at how many used tanks are sitting in people's garages and basements. I can't remember the last time I actually paid for a glass tank LOL (most of my glass tanks are for rodents though).