I updated a form but the auto-response email did not update properly

I added fields to the form by duplicating existing fields and updating them.  The new fields showed up on the auto-generated emails but with the name of the original field from which the new one was duplicated.  The setting is set to update the email when the form is changed.  I made the change manually within the email form but have other forms to update in a similar fashion and am hoping it works the way it seems it should.   

I was not able to replicate this problem in the form, old email template or modified or in the new one (with the green banner). Would you mind if I'll test this out in your form? 

Here's a quick screencast of the feature: https://drive.google.com/file/d/0B9mtzuWP8CbYU0pLc3dDSTczeXc/view.

I watched the screencast and see how it works.  I think I'll leave it as is and watch out for it.  If it happens again I'll let you know.  Thanks very much for taking a look at it and for your prompt response!