@catnipan -
1) did you review your tax return to confirm what the refund was supposed to be?
2) get on IRS.gov and review your transcript. Is it possible that that IRS adjusted your refund (and this would be unusual) so that it is higher????? They would be sending a letter to explain in a few weeks.
I'd want to figure out if the IRS made an adjustment or SPTG made a mistake.... so start with the IRS.
https://www.irs.gov/individuals/get-transcript