You know it's time to re-think your set of dining room chairs when two of them break in half and the other four regularly bottom-out on innocent sitters. They ended up being more of a good joke than a good deal - they clearly didn't represent one of my shining moments as a thrifter. Alas. So, I've had my eyes peeled for new-to-me, STURDY wooden chairs while at my favorite local thrift shop, Everything But Grannie's Panties. The place itself is just as much a hoot as the name indicates, and…