Jakeoclubs

I am currently using Harvey Penick Fire Steel Irons.  The wedges I use are standard from this set: 10, A, S, & L.  I believe these are lofted 46, 50, 56 (could be 54) and 60 (could be 58).  I am looking to replace the S and probably the L (maybe A?) so as to have a set of wedges, as I am very inconsistent with the S often hitting the ball left.  I am consistent with the A & 10 and pretty good with the L.  I am wondering if the design of the S is more for bunker play and that is affecting my fairway play.

Jakeoclubs comment on answer ago