Well I found that it was in fact a shoddy glass replacement. Too bad I already gave the eBay guy positive feedback.
What I found when I removed the proximity sensor was that the back side if the glass windows for the front facing camera, proximity sensor and ambient sensor all had glue residue covering them. It took a little bit of rubbing with a Q-tip and Goof-Off to get it clean enough to work. I'm sure glad I paid someone to do the job right so that wouldn't happen *sarcasm* I'll just do the job myself next time.