New to you....were there owners before you that couldve possibly had a choke cut off center? The only times Ive ever seen 1 barrel that badly regulated the choke was cut eccentric/irregularly. Cant say Ive ever seen a factory untouched gun with one barrel that badly regulated.
Barrel smiths can correct a badly cut choke in a barrel, Briley did this for a friends guns a decade or so ago.