Swiss pairings question

[moxpearl]

I have a question on Swiss pairings that I've been curious about.  From what I've read, players with the same match win% pair against each other randomly in the Swiss rounds.  However, in the Pro Tour Hollywood, the final 16th round pairings seemed to use the OMW% too.  So, the lowest OMW% with 36 pts had to play down to a 34 pt player.  This was disadvantageous because all the other 36 pters presumably drew in.  So, my question is does DCI Reporter use OMW% in the pairings in the final or any round?

[Apollyon]

In the final round and only final round, if I remember correctly, the pairings are generated as such:

Take the highest-ranked unpaired player.
Match them up with the highest-ranked unpaired player that they have not previously played.
Repeat until everyone is paired.