"I don't think anyone has ever reported finding more than 1 of the exact same error for the same chip?"

I found 6 in one order at the Firsta.
I found 3 in one order at the Palms.
I found 2 different errors in a 1,000 chip order 300, 300, and 400 of the real ones.

These things are run with most orders. Most get culled out.
How does anyone call any chip unique. There could be more on the tables unless someone has gone through and looked at both sides of every chip in the rack.