I've been running into this ever since v.14, but just now decided to seek out a solution: All of the dwgs in my current project are set with an LTS of 1, but sometimes when I go back into them for edits I find the LTS set to 40. Only myself, the CAD Mgr, and the designer have been in the drawings and I've ruled out any of us making that change.
So what is making the LTS set itself to 40, and how do I stop it?