Job number not showing up in Transaction Report

When entering a sales invoice allocated to a job #, afterwards when i search the job number in transactions it doesnt show the stock code that was used. It only happens to stock items not service items. It shows it in the transactions initially but when i get out to do something and then go back to transactions to check the job# stock item used it has disappeared. Can anyone help? In the attachment is the screen i am talking about i have entered in a sales invoice when i search the job# allocated to that job, nothing shows up.