Retirement tax questions

Ok so I have confirmed that it is definitly a simple IRA My account on Charles Schawb is listed as "simple IRA".  On my w2 box 1 is $800 more than box 2 however my IRA contributions were serveral times that amount.  Also just some math:  box 1 = gross wages from my last pay check - all pretax decutions (health insurance, fsa, dental) except for my IRA contributions.  The difference between that number and my gross wages is exactly my IRA contributions for the year.  Also my weekly paystub taxable amount also adds up that way gross wages - pretax deductions excluding IRA contributions.  Is my employer just not processing this correctly?  Seems like Simple IRA has to be pretax but it definitly is not.