Borderlands 2: Uncle Teddy

The mission Uncle Teddy appears to be broken, for me at least.

First, I picked up the mission. After dying twice, I pulled the plug on the fan, and entered the basement.

First thing I see?

(The door is open, but in it's unopened state)

Interesting..

I proceeded to open all of the loot doors, only finding 5 of 6 echo recordings. No doors, and no teal marker anywhere around any level where it is marked. No Diamond above any objects either. Echo6 is supposedly "In the Corner".

My game frequently glitches, and leaving the area and returning usually fixes it.

Usually.

(The door is in it's unopened state, but stuck shut)

A few other glitches occurred as well shortly before this, but I didn't think much of it. They included no skags spawning, breaking the sister mission Hunger like the Skag, and 3 of 5 echo recorders from Get to Know Jack failing to spawn. ((That's still in effect actually))

Where is the recorder, or where was it supposed to be? How do I fix, or if I can't, how do I "Band-aid" it? Is there something I did to cause this, or is Karma just catching up with me? Neither of these are story missions, so worst case scenario, I can simply ignore them. Simply.

Bonus points: How do you activate this lever?