Thank you Brink!
I've expected such answer.
Then I shall report an error to MICROSOFT, as the sorting is not working correctly.
In my case I've made Folders from A-Z ... now system has grouped...

PLEASE, I NEED HELP ...
you are explaining something on the "group view" ... but
how I can define the letters which will be in group? Like:
in your show case there are two groups "A - H" and "Q -...