I understand that the whole point of AD User bulk creation feature is time saving hence need to know the following before I know if it's any useful for me or not?

Is there any way to use an excel workbook rather than CSV as converting columns to csv format but take more time than creating the account manually.

I created a template in AD Manage Plus for user creation but when I try to upload a csv but got the following validation errors:

As per the screenshot below: 

• I have selected Logon name(pre-windows 2000) to be the same as logon name. I did provide the logon name in the csv file but got the validation error
• As per screenshot below: full name should be FirstName LastName. I did specify the firstname and lastname in csv file but still got the validation error
• Email alias should be the same as logon name. LogonName was specified in the csv file but still got the validation error