i found 2 dungeons right next to eachother. :D
That happened to me once. I dropped down into the dungeon and dropped sand into one. After I got down, picked up the top block so I was still out of reach I killed the spawner, I spun around killing all the zombies. After popping down and collecting me loot, I get attacked by another zombie. I quickly kill, spin around, and the chamber's empty. I board the up the door and listen. I hear a ton of zombies next to me, which I dig into it only a few blocks a way.
I ONLY GOT loving BUCKETS, IRON, AND STRING. I WANT A loving RECORD >:(