Creating a dungeon map

Hi!

I want to create a 'Dungeon Map' but i need some advice.

My dungeon looks good in the editor with corridor, room with monster and treasure and all the other cosmetic, but when i load it on a new game, random object spawn around (breaking room and corridor wall).

There is a way to prevent this?

Another question: there are something to read about trigger event? I would like to trigger a victory event when my sovereign reach the end of the dungeon, but i can't figure how to do it

Cià!