I looked on Tirerack (did you?) and did not see that the 4S was directional. There is a specific orientation on the wheel but that doesn't come into play when swapping locations.

 

Btw I did the left to right swap to see if I got more mileage out of tire I got maybe 1500 miles since tires wore evenly already and unless you have a mounting balancing machine or a free hookup it's not worth the cost

 

Was gonna say I can have a look on Monday when I’m back to work (I sell tires myself). Even still, I’ll have a look and see what I can figure out, don’t wanna say I’m an expert but I know a thing or two!