Yesterday I completed a module and got an e-mail confirming it (the sweatshirt carrot e-mail) but logging in this morning shows the module incomplete - in fact all of the units I completed yesterday are marked as to-be-done. Known issue?

The first challangeof this Superbadge seems to be problematic, showing the following message:
Challenge Not yet complete... here's what's wrong:
We could not find enough records in the 'Contacts' object. There should be at least 100 from the import.
What is interesting is that everything seems complete to me! I have inserted 100 contacts and 100 accounts, and of course all other items (Opportunities and Contact Hobbies).

Any idea why I see this error message?