I'm pretty sure the code that affects auras from OHCs is not actually doing so... I have not once noticed an aura change from OHC voting, even after the updates made to the aura system a few months ago.
I'll reiterate my suggestion that all aura changes be done at the close of a battle, instead of immediately, so that the relative values will be symmetric, instead of dependent on the time the botbr puts in their vote (only dependent on prior votes).