@maxim_k 

>>>>>Why do you think it is a problem?

I say it's a problem because in the oficial support and learning page of Dynamic Layer group, it says it can be removed, but i can't find it. (https://knowledge.autodesk.com/support/autocad-for-mac/learn-explore/caas/CloudHelp/cloudhelp/2018/E...)

>>>>>Does this functionality (Dynamic Layer grouping) affect your work in the AutoCAD in any way?

It bother me because it make new groups and change my layers order when i create new layers, so i get lost in the layers list and it slow me down. Because it's and automatic order, it duplicates the same layer in lots of differents folders and make my layers list very long. This is in a file of a city map that i found on internet and it already have a massive list of layers because it have a massive list of automatic grouping rules and come from the binding of severals xrefs. I wanted to clean it up, that's why i was looking for it. I share you the file if you're curious about.