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I don't have a jar of a Copper Sparkle to compare it to your picture, but the font of copper sparkle as well as how the date code is imprinted on there is correct. However, as previously mentioned, the wording on the back of the jar of the Copper Sparkle isn't the same as the other jars.
The Deep Blue Green font is correct, but there's no date code. And I think whoever you purchased this pigment from bought wholesale from the MAC warehouse in Canada because I am aware there's tons of MAC eyeshadows as well as pigments that were recently sold as wholesale lots and perhaps some of the eBay sellers bought them to resell. If the Deep Blue Green pigment box you purchased has a date code printed on the barcode and the spacing and font of the box is the same of the regular one, I would say it's authentic simply because maybe there was an error when MAC printed the label or maybe the tons of eyeshadows and pigments that came from MAC's warehouse in Canada were the ones that had some sort of error that were released to liquidation companies.
For example, I recall a previous post saying that she purchased a MAC pigment from MAC Cosmetics online and received a pigment with no label on the bottom of the jar. Since it came from MAC and the fonts and everything are correct regardless of no label on the bottom of the jar, I would say it's authentic. If it was me and that having no label on the bottom of the jar bothers me, then I would ask MAC for an exchange. That's just my opinion though.