19th century player- Real or No?

[tha-rock]

Saw this in a recent auction. It is described as being a cut autograph of Charlie Buffinton (d. 1907). Buffinton was a star in the early baseball days- his 11-year career was from 1882-1892. He is one of those guys that could have been in the HOF. His best year was 1884 when as part of a 2-man pitching rotation, he won 48 games, but as fate would have it, that was the same year that Hoss Radbourne won 60 games. Imagine winning 48 games and NOT leading the league in that category. He also pitched 587 innings and struck out 417 batters in 1884- Iron Man numbers for any era. Lifetime he won 233, with a 2.96 ERA and 1700 strikeouts. He died suddenly in 1907 at the age of 46.

So it's a rare autograph, and I'm interested in bidding on it until I notice one thing that really concerns me- his last name is misspelled. The cut signature reads "Buffington", when actually the player's name is "Buffinton" with no 'g' in the last name. That is either a major tell that this is bogus, or there is more to this story if that signature is genuine. The item has a JSA LOAA, which is bothersome. If this is Charles Buffinton's signature, why would he misspell his last name? I read the SABR bio in Baseball Reference and Buffinton wasn't illiterate. After his playing days he went into the family business in a front office position. His parents, his brother, and his 3 children all spelled their last name "Buffinton" if you believe the spellings on their grave markers and in ancestry. Does anyone know any reason why Buffinton would deliberately misspell his name when writing his name? Or did he always add a 'g' to his name when writing it? Could it be that someone else may have written his name and misspelled it? Am I missing something? Seeing this misspelling gives me no confidence in the JSA LOAA, and makes me wonder if they would certify it if the winner sent it in after the auction for a full LOA.

Do any of the 19th Century or Deadball era experts out there have any light they can shed on this?