<VV> Front alignment question

[AeroNed at aol.com]

I had the front end aligned today. The shop that did it was recommended and  
I've used this shop before with good results. The alignment that was done  
today is another good one.
 
OK so what's the problem?
 
I requested +3 degrees of caster. According to Finch's book that should  
result in onlt 1/4" of threads showing on the caster adjustment rods. My car has  
3/4" thread showing. Using the numbers in Finch's book, that would make the  
caster -2 degrees. If that were the case wouldn't the car be darty?
 
So my questions are, has anyone else had a alignment like this? and if the  
car tracks fine should I not worry about it?
 
Ned, RPE (registered paranoid engineer)