Problem importing contacts from xls file with 64 email addresses into my free plan

Problem importing contacts from xls file with 64 email addresses into my free plan

I have an Excel file with 64 email addresses I am trying to load into my free plan account.

Zoho warns me that if I import this file it will go over my 500 limit since it believes there are 700+ contacts in the file?!?!?  any advice welcome as to how I do this/what I have done wrong.  This is my first time using Zoho.

Thanks