I am guessing you measure to the center of the riser? if such is the case what does this read? I'm thinking about 7 5/16. Setup from the shop it was supposed to be 7 1/4.  

Measure from the low point on the grip . Looks like 6 3/4 to me.

agreed,thats the way I was taught by my buddies

Thanks guys.

Ok, then would it make sense that I've had the bow since february and the string has just stretched that much?

Play with it and find the spot where the bow is smoothest, quietest, and shoots best.  Make a note of it.  I bet when you raise the brace height back up, the bow will shoot better.  Don't think that a 1/2" in brace height is insignificant in how the bow shoots.  It makes a huge difference in most of my bows that the brace height stays in the sweet spot.