I agree with Typhoon, that tire never should have been patched in the sidewall.  Back when I worked as a Mechanic for Sohio we were told that patching a sidewall was unsafe and could lead to a blowout.
BTW, 
tire shops today try to insist than all the tire have to be replaced when only one is needed. This is a recent development and IMO absolute BS 
UNLESS you have a 
limited slip differential.  Yeah, a huge difference in rotation may make anti lock braking a bit flaky but most autos today feature under sized spare tires that in some cases are up to 1 inch different in rolling diameter.  So the auto companies don't feel there is a concern about damage with a very different rolling diameter how would a fraction of an inch less than 1/16 be a problem.  As for claims that it's the Law, ask to see that on a document issued with the state letterhead.
BTW, if you live in pothole central like I do then put the 17 inch rims in storage and go to 16 inch wheels. A 205-50R16 fits perfect and that extra sidewall height makes for a much smoother ride and a lot more protection from potholes.  I will also note that I found ZERO difference in cornering ability.