Here's how this saga worked out: After four or five trips to Napa here in town, I had finally amassed what I thought were enough 1" LH nuts. Turns out, I had transposed the count in my head, and bought two RH's I didn't need, and was short two LH's. I ordered the needed three in Wheatland, confident that Carquest had it handled. Harry then got to enjoy four trips to that parts store, eventually receiving all but one of the size we needed. Wheatland has three parts houses, two of which I go to for 99 44/100% of my parts runs. The other is out of the way, run down to the point of being uninviting. Guess who had the required LH nuts in stock? He also had the 2 1/2" axle nut socket I needed a couple weeks ago. Learned my lesson there.
Anyway, problem solved. We guessed the ongoing identical errors in these orders (Harry kept having to refuse 1 1/16" nuts, also) from two different parts retailers could be attributed to a common supplier mislabelling a batch of lug nuts at the point of manufacture. It sounded good over a six pack, anyway.