I got my Cardas test record out and placed it in smooth section and it imediately gravitated to inside. I adjusted anti skate to where cartridge slighty pulls to inside .If, as I assume, when you refer to the "smooth section" of the test record you are referring to the ungrooved sections it has, keep in mind that when "playing" an ungrooved surface the skating forces that would result when the stylus is in the groove of a rotating record are not present. Therefore I suspect that the amount of anti-skating force that is being applied is still too low. Although not being familiar with the arm I have no idea why that may be, given that you have set the anti-skating to max.
One thing I would do, if you haven’t already done so, is to view the cartridge head-on (from the front) while the stylus is in the groove of a rotating record, and see if the cantilever is visibly deflected (probably to the right, toward the outside of the record), relative to its position when the stylus is lifted off of the record (presumably straight ahead, or close to it). If deflection to the right is evident it would confirm that for whatever reason your anti-skating force is still too low, IMO.
Good luck. Regards,
-- Al