It did! I'm completely back to stock. I decided to update to the latest RUU that AT&T has released. Just to avoid AT&T wanting me to update to see if it fixes the problem. I know for a fact that it wouldn't fix the problem anyway.
Oddly, my phone told me I was up to date while on the .12 RUU even though I knew the .15 RUU exists. I downloaded the RUU for .15 and it ran fine once I went back to stock after running the .12 rom.zip.
In summary, you saved me from a huge headache! Thanks so much for all the help & kindness.