Default button assignment question

[Rekrul]

This isn't a complaint, just something I'm curious about.

When you test out a new version of PPSSPP and it comes up with the default settings, the buttons are mapped as follows, going clockwise, starting from the 12 O'clock position;

Code:

Triangle = Button 1
Circle   = Button 3
Cross    = Button 2
Square   = Button 4

Yet on every controller I've seen, the buttons are numbered in order starting at the 12 O'clock position and going clockwise. Meaning that they're numbered like this;

Code:

.   1
.4     2
.   3

This causes the Cross button to be mapped to the 3 O'clock position and the Circle button to be mapped to the 6 O'clock position, which doesn't match the layout of any real PSP.

It's easy enough to remap these two controls, I'm just wondering if there's a specific reason the defaults were mapped this way?