asp mvc uploads a record three time on one click

Question

when I click html bttn to upload a data as name phone date and time it uploads it three time. it uploaded a record 9 times instead on 1 time but since I changed some html codes it became to upload a record three times instead of 1

here is the action result on homeController 

here is my html webview

and here is my table after I clicked the upload button for 3 three time only.