why hload dosent delete from folders?

this is after delete hlods.

and this is correct way to build hlods?

I did like this:
This is after lod group switch to hlod layer, first level of height detail hlod from grid and instances captured from grid name like a biomes of building and road and anothers.


and after build hlod levels like this:

First level is a Hight quality hlod cell size is a 25600 resolution is a 1024

And after 25600 Medium quality hlod cell size is a 51200 resolution is a 512

And after 51200 Low quality hlod cell size is a 102400 resolution is a 256

And after 102400 Far quality hlod cell size is a infinitely resolution is a 128

or i need to use instancing and instanced and after merged hlods before include hlod levels custom?