Figured it out. Both DC's had inconsistencies between configurations and they basically weren't replicating or failing to serve DNS requests because the Interfaces were all over the place.
I used this opportunity to take a crash course on Configuring DNS to understand all of the settings, and I was able to fix it by thoroughly sweeping the settings and correcting as I went.
I've never seen the Security log so empty before. It's a great feeling. Also, I learned a bit about DNS so win-win.