I lose money on buys like this almost as often as I make it. That's what happens when you buy aggressively.
So this time patience and years of dipping has helped you. How much of a profit do you think you'll make? Just being curious, nothing more. I salute you for making a good coin look better and spotting the overdate in the first place, good work!
The "sniffer" does not detect coin dip. And even it did, coins would not be rejected because of it. On top of that the "sniffer" isn't even used on coins unless they are submitted under the Secure Plus grading tier.