1808 10 Cash. Only shipwreck coins?

Hello Experts,

I had picked up a 1808 10 cash from a general dealer for a few hundred rupees (< 7$). 
 

I then learnt about admiral Gardner and ordered a NGC certified shipwreck coin. This obviously cost  more. 

question: how do I reconcile these two purchases of mine. 

Option 1: Both are shipwreck coins. just that the second one of them is certified 

Option 2: The first coin is a non shipwreck coin that saw circulation 

Option 3: The first coin is a fake 

I am hoping it is (2) :) 

54 tons of these coins were struck in England and the wreck is still there off the Thames estuary but further exploration is banned, the ship carried a hold full of barrels of coins, each barrel contained around 28,000 coins so I can't imagine why anyone would fake one, likewise why you would need to pay for one that's certified by NGC

Ok! I read mores rather asked chat gpt ;) . Looks like there were both shipwrecked 1808 10 cash and also other regular 1808 10 cash coins that were in circulation. 

so its option 2