Have you played around with the paddle screw at all ??
They make production calls by the thousands. There's a good chance the factory tuning may leave a bit to be desired.
Loosen the screw quarter turn at a time and try playing the call. See what that gets you. Maybe a turn and a half, max. If it doesn't suit your ear somewhere along the way, return the screw to it's present "zero" and tighten it a quarter turn at a time. If and when it starts to tighten up, stop. Don't wanna risk splitting the end block.