ID 128 Spur is not really a route in its own right so much as half of a wye junction. Even Corco, one of the most persnickety clinchers known, does not recognize it as a distinct route on his website. It is also, FWIW, not in any way signed.
As for the question of handling spurs in general, I generally agree with the principle of making it "Route XX Spur (Town)" if it's signed with a "Spur" banner in the field, but simply "Route XX (Town)" if no spur banner is present. Meanwhile if the spur is unsigned it ought to be left out of the HB as an unsigned route even if its unbannered parent is signed.