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Ahh, that makes sense. I did think I was getting less EV using power items on the wrong horde but was never really able to check the numbers since I don't have the berries I need for the reset juice nor any of the reset bags. Thanks for the correction.
I dunno if anyone else has noticed this but since I havn't seen anyone mention it, I thought i might as well post on it.
You can use the power items to change what EVs you get from each horde.
For example, say you want to EV train your pokemon in 252atk/252spe so you head on over to route 19...