Oh dear! I'm sorry it has caused such confusion.

The example map was created before the symbol catalogues, so the symbol definitions aren't quite right.

It's looking really great :)

You could still use FLOORPLANADD. If the map itself is a different size you can use Resize Drawing Area in the Draw menu to correct that so that it matches the other levels. If the layout is the wrong size you could delete it and copy and paste from another floor using the map origin as the copy and paste origin. Then, even if you only want the walls from the other level's map, or the walls and the stairs and dividing walls, you have a head start on things.

You could just put the different floors in little sub-framed sections with the same background of cobbles behind each one, but made paler (or darker) as the floors go up?

I think it will be confusing having the original map as the background, but that is only my opinion.

@jslayton - one fairy ring kit (separate toadstool groups) :)