Well, that blows that theory.
Might be worth trying for a partial refund, maybe the cost of shipping both ways since that's what they'd be out if you return them because of their incorrect information.
A refund is not a problem. I've been a customer of SG for more than 10 years, and their customer service is excellent. I sent them an email in the middle of the night about my issues and before noon they responded and offered to refund my money and ship it back at their cost. I'm not going to do that, because it is actually a well-made can.
I currently have a pile of NATO cans, 8 or 10 20L, 2 10L, and 4 5L. I'm probably being picky, but I would really like the can pictured because it would more closely match the genuine NATO cans. The 20 liter can that herdnerd posted is a fairly close match to NATO cans, but the 10 liter they are shipping is shaped differently. It isn't the can they picture, and it isn't U.S. made. The front and rear surfaces are round instead of flat. Other than that, I like it.
I'm going to put gas in it and lay it on it's side in the sun. If it hasn't leaked in a couple of days I'll be satisfied with it, in spite of the fact it's the wrong shape and made in China. I'll live with it.