Board Thread:Speculation House/@comment-24.212.150.137-20171014022757/@comment-4010415-20171014024552

The intent that Ozpin's group had for the machine was to bypass - as in, completely ignore - that rule about the Maiden powers going to the last young female in the Maiden's thoughts. The entire reason they had to transfer Amber's soul/Aura to Pyrrha through that machine is because Amber's last thoughts were most likely of Cinder and there was no other way to get the powers into Pyrrha.

Also, the Aura transfer machine takes the soul/Aura of the person in Pod A and puts it into the person in Pod B. Oscar would have had to be in Pod B for Ozpin to use the machine to transfer his soul over to Oscar, but Oscar was on another continent at the time.

Honestly, I think what happened was the male equivalent of how a Maiden's powers get passed on.

Recall that Qrow told RNJR that, when a Maiden's powers get passed on to someone else, their souls become combined "in a way". And we know that Ozpin's soul is merged with Oscar's. The last person in Ozpin's thoughts was most likelky Cinder, but Cinder is a woman, not a young male. So then, the rule of "If the last person in their thoughts is not a suitable candidate, it goes to someone random" came into play, and Ozpin's soul went off to a random young male somewhere in the world. Poof.