I had more than once the situation when I met villain and start temporary closing the locations with other characters, and one of characters was in Catacombs of Wrath and since its closing condition was to fight with summoned henchman, it was summoned and after I defeated him the game thought that I had won the real henchman of this location and proposed me to close it, summoned the henchman again (as part of closing condition) and then permanently closed the location. And only then continue temporary closing other locations and fight with villain.

Edited June 24, 20169 yr by Yury1975

There is another thread (or several) about summoned henchmen engendering perm-close opportunities, but I don't have a link handy.