[b41] Grave event bugs

[donkatsu]

There are multiple graves on Daikara 2. When I enter the second one, it takes me to what was presumably the same level to which the first one took me. The exit stairs from the first one are still there. After I survive the second wave, a second set of exit stairs show up while the first persists. When I took the second stairs, it brought me back to Daikara 2, inside a wall, where I would have suffocated to death had it not been for the debug console.

[Planetus]

I had a similar bug on the lvl 1 of Tempest's Peak, but worse. There was a grave on top of the stairs down into Tempest's Peak. When I walked over it, I refused to disturb the grave, but pressed > (change level) instead. It took me to the grave level. When I got out, it brought me into the black squares on the edge of the map and I couldn't move. I had a phase door rune, so I used it. I went back to the grave/stairs and tried again. It said there was no change level option on that tile. Now I can't complete the Derth quest.