I figured it out. I'm using Reality XP GTN750 and it auto-loads frequencies. These frequencies closely match the real frequencies that I see in Foreflight.
I recently discovered the "Details" tab when clicking on the airport inside of the X-plane map. It lists communications frequencies. Thus while the AWOS for my airport in real life is 121.45, X-plane uses AWOS 3, which is 133.82. In short, there's nothing wrong with my system, I was just using incorrect frequencies, muddied a bit by the mismatch between Reality XP GTN/GNS and X-plane. But now that I know, its totally worth having the Reality XP plugins (love them).