Names of fields in the editor's properties do not match names of inputs in published form

I'm trying to prepopulate a form's fields via the querystring where i expect the 'name' portion of the query string to match the name property found via the editor. But when I ViewSource on the form (http://www.jotform.com//?formID=32525522499156) some names match and some do not.

e.g.

but in the editor's property inspector that field is named 'webinarid'

If that's expected, fine....I can use names as are found in ViewSource but i'd be slightly concerned about longer-term problems.

The form builder usually appends an id at the end of the field name after generation, this is to enable for easier referrals if you downloaded the full source code and want to pass values to a custom php code.

If you are not planning to use the full source code option and want to use the form as it is, hosted on jotform, use the normal names without the appended id q11_webinarid