Yes... tire diameter matters in the calcs. I assumed a 26" tire diameter for the calcs (close to stock). I can re-run with other diameters if somebody wants to know.

As far as how much toe to run I think it is application and driver dependent. Auto X'ers often run some toe out to facilitate fast turning. Toe in promotes stability... which the OP was lacking... thus the suggestion to go with factory specs for toe in. Also, a little toe in compensates for the road force that is "stretching" the steering linkage as you roll and trying to toe the tires out. The idea being you want the tires to be almost straight at speed.