On uplaod file interview save automatically

Hi team
i have face one issue in interview doctype when i try to schedule interview i have one field which data type is ‘Attach’ and the field name is ‘Resume Attachment’ when i upload resume automatically save interview but still i have not fill other fields and i have set notification action on save. automatically saves mail send to job applicant,interviewers and when i manually save interview then again mail send to job applicant and interviewers.
it means two time mail send to job applicanr and interviewers
please help