Got a C grade to show up when i got an A

So, I aced a class during the summer semester, scored an A. But here's the kicker - when I checked the hub, it showed up as a C. I immediately reached out to my advisor and the professor from last semester, but they hit me with the "it's too late to correct" line. It's a bummer because it knocked my GPA down by a tenth of a point. Not a huge deal, but super annoying, especially when I know I deserved that A. Anyone been through something like this before?

I have never heard of any such incidence. But yeah I would suggest do check the grades on Hub as well as soon as they are out, and get in touch with professor if any discrepancies.