Sorry I didn't see this one
Okay the first the Surface wizard that is free is about 20 years old and I never work on it
The wizrad set from me is worked on all the time! If there is a bug I fix it becasue I want it to make your life a little better not harder...
Now as for the Stock height you are just about right! this is so you can cut from Z.2 to Z0.0 . This may not seem to be any realy big deal but think of it like this. If you have a chunk that is starting out at about 1" by 1" and you would like to have it .75 by .75 and Z0 to be the top of the part in the end when it is .75 . So you turn on the spindle take to tool down till it just cuts and type .25 into the Z axis DRO. Now you run the wizard with .25 as the stock height and cut it down to .125. Flip the part and cut from .125 to 0.0 and you are done
Hoe that helps
Brian