Mike, 

The added inch is a lot for someone who is 5'10", considering we have Tour Professionals who are closer to 6'2"-6'5" that aren't more then 1/2" over standard.  I would say those impact marks could be coming from you possibly coming out of your swing.  This is common for players who don't hold their spine angle through impact.  Those players will see added length needed when being fit.  I am 5'10" as well and play standard length.  I would consult another club fitter and have him take a look at your swing as well how you come through the impact area.

Cameron

1-888-TITLEIST 

I'm 6'1" with a wrist to floor height of 35.5" and use standard lie and -1/4" up to the 9 iron on the AP1s, standard length and lie on the PW, +1/2* and 35.25" on the 50-08 and 54-14, and standard length and +1* on the 60-10.   I hit the ball dead straight and clean and the scuff marks are dead center on lie angle tape.  I use a 44.5" driver, 42" 5W, 40" 4H and 39" 6H (the long clubs are TM).

If someone is an inch long and 2* flat, sounds like a very horizontal swing with a lot of knee flex.  I saw a post of an individual who is 5'7" using 1" long and 2* upright and it turns out this individual stood almost totally vertical with just about zero knee flex.

Mike, I'm 5 8 with longer arms i got my new ap2's 1/2 inch shorter, if i was you i would go to another titleist fitter and see if thats the right length, i might be your arms may be just a little shorter, how you bend over the setup, your swing alot of variables but getting a second opinion doesnt hurt and i just might save you alot of greef. billy