Solved!
SortTRACK = Sort by track number as in de MP3-tag info.
It is not the track order ( # - column).
Feature request:
Add to Midi-map - Browser => Sort#
or/and
Toggel all the Sort buttons to Sort-Up/Sort-Down/Sort-Reset (just as the mouse clicking the column).
Now they only toggle Sort-Up/Sort-Down, and ther is now way to reset to TrackOrder (#) by using the controller. You have to use the mouse.

