Debt missing from credit report?

I had my home foreclosed on after applying twice for a short sale and being told I did not qualify for a deed in lieu of. The house went up to auction and sold for 50,000. I owed 75k. I went online and checked my credit report and it said that my 75,000 debt was dropped. Is that because the bank got 50k and will have to rework how much I owe? Will the new amount show up on my credit report?

I got a check in the mail from the bank for $170 because of an error in reporting something to the IRS.

I wasn't sure if that had anything to do with my debt being cleared on the house but I highly doubt they just forgave my debt since I would still owe them $10,000 ish.

Anyone have even an idea of what would cause the debt to be cleared? It does not say on the site.