On my form name: Wesmar

With zoho support's help, i've finally managed to craft a form that functions the way i want, and seems to display properly when scripted to sendmail (except the template does not display more than about 20% of content)

However when i try to use the expression in sendmail subject line "input.Customer_Name" - it outputs a string of numbers like 2511901000000054103.. Note, it does this when Customer_Name is a lookup field. It works fine if it's a normal Single Line field... But i'd like it to be a lookup field for the auto complete search feature.

Any way to fix this?