Imported Batch Troubleshooting
Any Donations not matched to a Donor during import are assigned to Donor ID #1 "Default Contact" since you must associate every Donation with a Donor. You can reassign these Donations to the proper Donor. Next, assign the affected Donor's an Envelope Number to ensure they match in future imports.
During import, each Donation has the Batch's Setup Date which reflects the date of the first donation in the import file.