I have the same problem with the Steeda sway bar I just installed and the stock springs. When I took out the stock bar the Steeda bar was physically wider than the stock one. Have you called Steeda about the problem yet?
Everyone's solution has been to just chop off the last hole as its not used anyways. Everyone is either using the 1st or 2nd holes. Gives you more room all around and that third hole is really pointless anyways. Really, BOTH two end holes don't serve much purpose.