I have never "double won" anything from GL or any other government related auction.
I HAVE however won multiple lots unexpectedly in non-MV related bidding. Typically the winning bidder defaults and they "offer" the bootie to the next higher bidder (without forcing them to take it). In those cases, since it's my choice, I have typically taken what I can afford. Surprisingly, almost every time that happens, I sell off the surplus from my good fortune and make a buck or two... almost always enough to cover the ONE item I was actually wanting, hence getting mine FOR FREE or at least really cheap. So far, I've been able to sell off those extras locally without much hassle, so even the overhead for liquidation is minimal... Love the NO SHIPPING aspect when dealing with heavy items.
Probably the best one was some unfinished (not shot-blasted, nor any grinding done) CANNON BARRELS from a defunct foundry. They were DECORATIVE ONLY and not cored for boring to a true cannon caliber. Each piece weighed in at 650 pounds. There were six up for bid, I got only the cheapest one, which was good for me since one is all I wanted. One bidder had gone much higher for the other five pieces, then defaulted on the whole deal. The auction house must have thought this through long and hard. They seemed desperate to unload these cannon barrels. When they called me to see if I was interested in the full set of six they had already contacted a shipper - who told them they could be shipped as SCRAP METAL Freight Rates since they were unfinished and from a defunct manufacturer - and had a "proposal" already prepared for me. If I took them all for just four times what I won the one for, they would palletize them and pay the freight!!! That was too good to refuse! We inked the deal and they were on my driveway in just 4 days. In the end, I came out smelling like a rose grossing over $4000 PROFIT, selling all six to a nearby rancher who wanted to display them on the hill outside the huge windows of his ranch house. He's had beautiful carriage sets made for them and appropriately scaled cannon balls too. (Though the barrels are only bored about 4" into the muzzle to appear real.) Kinda wish I had kept one, but his display does them much better justice than what I had in mind.
Carry on.