I found somewhat of an explanation:
As I was (and still am) new to the MV I only loaded my patches via "instruments>menu>load patch"
Only then do I get this kind of display...
But if load patches via the "import" button I do get everything displayed properly !
So Widdly, I think you are right about one being file names and the other being patch names, but somehow the "normal file utility" and the "import utility" display the file names and the "load patch utility" displays the patch names...
Anyways, was a little bit confused but all is clear now, case closed!