A strong Hold glitch
Thats normal. 'Sept for the door. But I bet you added that.
Thats normal in Minecraft
It's not a glitch, I'm pretty sure it's mostly intentional... especially since the floors of the dungeon always seem to line up with the floor of the Stronghold. I found a Library in the stronghold with a Dungeon built into the wall of the second floor walkway. Skeleton snipers were shooting me from the balcony
oh well its minecraft one sc you explore the other you die or fall or burn.
That's how you know you're playing a damn good game XD