I interpret that disclaimer as "it's cleaned, don't try to come back on us if it doesn't straight grade". They don't disclaim authenticity, and even if they did, they'd be in a world of hurt if they tried to sell fakes. That being said, I'm not comfortable authenticating this date myself, and I don't know how well they can do it, so... pass.
A while back I posted a pic of mine and someone had an overlay that showed the mint mark location was correct. Don't know if that is a valid way to verify or not. Bought mine from a dealer that would refund.
I always assumed that the period between the V and D was usually almost right in the center between the V and D. At least mine is.
Here they show the four mintmark locations along with some other identifers. https://coinweek.com/from-the-dark-corner-an-authenticated-1909-s-vdb-lincoln-cent/ to me the S looks wrong. Should be a box, the S looks too tall The top and bottom of the S looks too thick The N on the reverse looks wrong plus the already mentioned wrong dots
