Sage CRM Import Lead Issue

I think I have run into an issue with importing Leads to Sage CRM. I am trying to import leads and assign them to Susan Maye. I have uploaded them and told the Upload Configuration to assign to Susan. It did not. I then created an ‘Assign_to’ field in the spreadsheet and tried to map the field. It did not. Neither upload method populated the field. Please see screenshots below.

I wasn’t able to find anything in Sage City nor the KB.