Things keep spawning in my house and it is Really annoying? (Minecraft)?

I have a cabin that I thought was safe but apparently it isn't… It is 100% lit up with torches but zombies and skeletons spawn in my house. I KNOW it is lit up. And my doors are always shut! And this is on my Xbox so zombies can't break threw the doors… Urgh-.-

Anyone know what may be causing this?

Guest

Completely walled in? Your not using leaves anywhere are you? Leaves don't count for whatever reason. Check the area below you. You might be on top of a spawner

james