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We bought a flat (20) last week from a local organic market and had the same thing happen. All 20 eggs were double yolked. It was the weirdest thing.

When I was young and impoverished I used to work in an egg packing factory, a horrible job, but it paid well. As people like their eggs uniform my job was to check that the eggs were all the same - they would pass in front of me on a metal grid and a bright light was shone through the eggshells.
Any non-uniform eggs - double yolkers, part fertilised, deformed shells, that sort of thing, were snatched from the line and thrown into a big vat, and taken off to be dried to make egg powder and used in cake manufacturing

Could the egg checker in this case have meant to put the double yolkers on one side for disposal, but made a mistake and packed them instead?

when i was a kid we had a chook (that's what we call chickens in AUS) that laid double-yolkers every time

Same thing just happened to me! I bought the eggs last night from TJs, but they're only large, not jumbo. Weird!

I need to share my own double-yolk experience. I live in Paris. I often buy cartons of 30 eggs from our cheese/dairy vendor at the outdoor market. Two weeks ago, every single egg out of 30 had a double yolk. I couldn't believe it! The next time I talked to the vendor, I explained what happened & he said it was normal & that you'll find "twins" in the larger, longer eggs.

So, thanks to the previous comments for reassuring everyone that this is actually nature! And explaining why. Between you & my vendor, I feel no more fear with multiple double-eggs in the same carton! Not a freak thing after all.

It's a government plot to get everyone to switch to artificial eggs produced in a secret laboratory underground in area 52 next to area 51, using toxic waste. It's all so simple.

Total jackpot! Thanks for all the info, guys. My SO LOVES yolks and so do I. I usually don't get jumbo or buy eggs at TJ's but you better believe I am going to do so from now. I have stumbled upon a few double yolks before and was always totally stoked. I would consider myself very lucky to find a whole carton of doubles. Nothing freaky here, just delicious!

This just FREAKS ME OUT!

Whenever I buy jumbo eggs at a local ShopRite, ALL of them always have double yolks, with a very rare exception. I'm not talking about one dozen here - every dozen I buy from there, and it's been this way for at least a couple of years. I don't understand what exactly is sick or creepy about it.

thanks to janaatwg for the enlightening info! I believe in scientific facts too :) well, janaatg, can you help me answer this question: my mom cracked an egg with the egg white part a neonish yellow!!!??? we didn't eat it because it looked kinda toxic...

Kinda reminds me - new meaning for the term Octo-mom!

At the farmers market I go to in Dallas one of the farmers seperates out the double yolked eggs and you can buy those by the dozen.

Chernobyl Egg Company...