3. Blockchain scan is complete
By "scan", do you actually mean "sync"?
-snip-
I'm going to try a rescan now and see if everything works out.
Let's just hope that your blockchain isn't pruned or it'll re-download the whole blockchain if you do that.
I doubt it. If OP use pruned mode, he'll get warning that Bitcoin Core will redownload whole blockchain when he
resumed load his old wallet.dat.