Playlist/ Sorting by filename

[nji9nji9]

I don't know if this is a question or a feature request... :)
Drag' and drop some tracks to the playlist shows them as
meta infos (if exist), right?
And it seems to put them in arbitrary order.

But most of my albums (maybe by most of us?) are like that
01 - ztracktitle
02 - btracktitle
03 - ktracktitle

Dragging them onto QMPlay2 doesn't show the numbers anymore,
show them in arbitrary order at first place,
and sorting is only possible on ztracktitle, btracktitle, ktracktitle, ...
which is completely wrong to the albums order.

Do I miss something or do something wrong?
If not it would be essential to somehow (...) keep and show
the filenames and order.

EDIT:
I know I can drag a whole directory to QMPlay2.
That seems to keep the order of the filenames.
However that's not the use case I'm adressing.