Thanks for sending over your spreadsheets! I suspect that the issue is that the Encounter.submitterID field is case-sensitive. The Bulk Import preview highlights it in green to show it’s a valid entry, but then it doesn’t assign any of the encounters in the import to you. I did a test upload with your username in all lowercase letters so that it matches what I see in the user dashboard and it correctly assigned the test import to you.
My recommendation is to delete the bulk imports, update your spreadsheet so that your username in the Encounter.submitterID field is all in lowercase letters, and then try uploading it again.
Edited to add: I’ve tested this in other Wildbooks and verified that the submitter ID field is case-sensitive, so I’ve updated our Bulk Import help doc and Bulk Import Cheat Sheet to reflect this.