"America's Navy" and "Tattletail" discrepancies

Can anyone out there explain the discrepancies between the arcs for the Mk92 CAS and Mk92 STIR on a 1989 O.H. Perry between the "America's Navy" book and the "Tattletail" scenario? The fleet book has no specified arcs for the directors, which means they should use the ones from the mounts they're associated with, in this case P&S for the CAS and F for the STIR (though since the CAS is also listed as a radar in general with 360 degree view, I assume it can also direct in 360 degrees).

However, the "Tattletail" scenario has an O.H. Perry with an F arc for the CAS and a P&S arc for the STIR, the complete opposite of the fleet book, not to mention a PW/SW arc for the backup OP gunfire director, whereas the fleet book lists no such arcs and assumes the director will have the same arc as the mount. 

What gives? Both of these documents are supposedly updated to August 2024