Somebody check to see if Hell has frozen over!
That IS strange: I'd expect the rear to be 1.5" to 2" higher than that, and the R/R to sit higher than the L/R.
You double-checked that what you received is what you ordered, and that they are in fact SS springs? How are the leaves oriented? They should all be located forward of where the stock leaves sit, with the exception of the 2nd leaf.