UPDATE 1
Well, whaddaya know? Not only did Pep Boys get me to buy a brand new tire, but guess what? That's right! Brand new tire is leaking. Now I'm convinced I was defrauded.
DO NOT SHOP HERE!!!
UPDATE 2
At last my tire issue has been resolved, and it wasn't by the chuckleheads at this Pep Boys. I took my vehicle to the Kia dealer and they quickly diagnosed the issue. It turns out I had a broken valve stem and bad tire pressure sensor. In fact, they said the tire pressure sensor was just rolling around on the inside of the tire. I will pass on using Pep Boys ever again.