I'm having the same problem with the UPC Mediabox (URC was a typo by the topic starter).
For example:
0000 0072 0000 0012 000F 000A 0006 000A 0006 0016 0006 000A 0006 000A 0006 001C 0006 000A 0006 000A 0006 000A 0006 000A 0006 0016 0006 0010 0006 0016 0006 0010 0006 0010 0006 0016 0006 001C 0006 0CCD
is a working learned code for the "cursor right" command I got from a ccf file in the files section.

But what I get when I try to learn this same button is:
0000 0073 0000 0011 000F 000A 0006 0016 0006 000A 0006 000A 0006 001C 0006 000A 0006 000A 0006 000A 0006 000A 0006 0016 0006 0010 0006 0016 0006 0010 0006 0010 0006 0016 0006 001C 0006 0CAC
Now if only all the buttons I need would be in the ccf file I could just copy and paste them but this ccf file is missing a lot of buttons so I still need my pronto to learn some of them.
Can anyone help me out please?