World Composition levels don't stay loaded

Good morning everyone :),

I’m having trouble with keeping my tiles loaded when I import them into ue4 and save them. I had posted about this some months ago, but I think I was kind of confusing with how I was wording things,
but this time I’m more descriptive with screen shots :D.

http://s1.postimg.org/w3f5abq3v/img1.jpg

This image shows that I have my world composition enabled.

http://s17.postimg.org/p9gp334vf/img2.jpg

My tiles are named properly and I’m ready to import them.

http://s30.postimg.org/9gc27901p/img3.jpg

My tiles successfully imported.

http://s9.postimg.org/qetjth93f/img4_a.jpg
http://s20.postimg.org/vq7addx49/img4_b.jpg

These images show me loading my tiles.

http://s20.postimg.org/m6xljx9m1/img5.jpg

My landscape loaded in project successfully.

http://s20.postimg.org/57on4nyeh/img6_a.jpg
http://s20.postimg.org/v4ibha221/img6_b.jpg

In these two images I have saved all my levels and exited. (You will noticed that the “*” beside map2 is gone in the exit engine image)

http://s20.postimg.org/fqt87kqg9/img7.jpg
http://s20.postimg.org/hwnj22twp/img7b.jpg
http://s20.postimg.org/r6zn5m4mh/img7c.jpg
http://s20.postimg.org/e5dyfrg89/img7d.jpg
http://s20.postimg.org/s1qs5e1ux/img7e.jpg

I open unreal again with the default level, I double clicked my map2 level, my tiles are not loaded, and I have to reload them again. (You will notice that the “*” is not beside my map2 level)

All the tutorials I have followed on youtube to import tiled landscapes into ue4 by world composition haven’t had this problem before.
When I was using ue4.6, i didn’t have this problem, but from ue4.7 on up this has been happening.
I’d appreciate any help that can be given because this is a major hinder in my progress so far with the engine. Thank you all for reading :D.