Boss not spawning in spider dungeon.

[Gatewalker]

Basically see the topic. I'm playing the b43 release, using the rare rares addon.

Skeleton Archer character. Went into spider dungeon, the name of which I will never remember how to spell, and got to the 3rd floor. The floor was much, much smaller then I'm used to, and did not contain a boss or stairs down or anything like that. I used a pick to dig literally every section of wall away so it was nothing but a blank floor(to make sure boss wasn't hiding somewhere), exited/re-entered the floor, exited/re-entered the entire dungeon, and nothing doing. Boss did not show up anywhere.

I know I'm playing an out-of-date version, but figured I'd report it anyway just in case?