Question about world machine to UE4/landscape mode

A new, community-hosted Unreal Engine Wiki - Announcements - Unreal Engine Forums < As seen here, when he discusses the new landscape mode tool , and going into ‘levels’, there are three distinct levels starter, minimum and Example, all under Persistence Level.

I had to remove some of mine as for some weird reason my map became unusable. Even though just one terrain and lighting and 3rd person char. were showing, when I pressed play, a ton of stuff came in including a small 4 walled house with spheres , chairs and table. No idea where it all came from, getting used to this editor, so maybe I did something I was unaware of and caused problems.

When I got things back to normal, I just had my terrain, character and lighting as before, and in levels tool, it just showed: Persistence level with one sub level underneath of example_map, my terrain and the lightmap. Is this okay ?

It all seems to work fine, I just wanted to make sure it was going to be fine, and not cause trouble with landscape mode.

thx
nl

NO idea how far down this is on the forum, but I still need help with this Im afraid.

I just want to be sure is all.

thx
nl