Errors shown during employee import

When importing employee data (especially large piece of data at the point of implementation), the errors shown are individual rather than in bulk : example of an error "5 Payroll Codes in your CSV file (including '1802') are already in use".

It would be great if the system highlighted all of the errors so they can be fixed in one go rather than one by one which requires me to upload the same sheet 4 different times (fix, upload, fix upload)