Game Problems

[FlawlessHappiness]

It's a file that is generated. Like some kind of autosave.
Bugs happen if you have it.

"cache" is an extension.
Ex. if your map is called "Tivoli" then it's: "Tivoli.cache" (i think)

So if you've got it, delete it.
It might be in your virtualstore, (if you have windows).
You can find it by going to Users/[USERNAME]/AppData/Local/VirtualStore/Program Files (x86)/Amnesia - the Dark Descent/redist/custom_stories/[STORY NAME]/maps

It isn't that, is:

Amnesia-The Dark Descent/redist/custom_stories/yourcustomstory/maps/

It depends.

I have my custom story 2 places. In virtualstore and the place you have it.

When i save my .map files they are saved in the virtualstore place.
Also .cache files are stored in there...