The situation you described immediately sounded like a weak or malformed extractor when I read it. After browsing that thread some more last night I guess my suspicions were more or less confirmed.
We've got several Glock certified armorers on this forum, some as members, others as vendors, who would all likely be more than happy to assist you with troubleshooting and/or parts replacement. I know I preach this a lot, but the Vendors who support this site deserve our support in turn. TN Gun Country is not and, to my knowledge, never has expressed interest in supporting TGO. While they may be a great shop with great folks behind the counters, I'd try to swing some business towards one of our Vendors if you could. Without their support, there wouldn't be a TGO.