It’s possible you may have missed a previous deduction, and the carrier has recalculated the deductions to recoup the missing deduction.
It’s possible you may have overpaid, and the carrier has recalculated the deductions to a lower amount.
In some instances, the deductions may be recalculated up or down when there are 2 pay dates one month and 3 pay dates the next month.
If there is still concern, contact BenefitHub Customer care at 1-866-664-4621 or email customercare@benefithub.com.