The only things you can do are:

Force the Fit, Luke....(not recommended) It looks like moving the saddle would tend to
draw the sides down, which may be the right move when moving a saddle that far forward.
Perhaps it was intended that way.

Get a different seatpost, if spacers between the clamps and ears of the post don't work.
Perhaps longer bolts, and washers between the ears and clamps would work.