i can not duplicate a field?

Are you having this issue on a particular form? Is this the form, http://www.jotform.com/53554727664162, you're having an issue with? If yes, may we know which of the fields on that form are you referring to, please? I have cloned your form and I wasn't able to reproduce the issue you're having for I'm able to duplicate the fields in it. 

If you're still having issues duplicating fields on your form, please give us more details of the issue you're having so we may further assist you. Thank you.

Is this the correct form: http://www.jotform.us/form/53554727664162? What field(s) are you trying to duplicate on that form and you're having troubles doing so? Are you getting any errors when you're trying to duplicate a field or nothing happens on your attempt?

We will wait for your response. Thank you.