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Apologies for the inconvenience that this might have caused you.
Upon checking your account, I see that you also have an opened thread here http://www.jotform.com/answers/457255-My-form-reverted-to-an-earlier-version-of-form-How-to-recover-the-form-changes#4. We usually get back to the user as immediate as possible, but depending on the issue and the number of inquiries that we have.
Again, I apologize for the delays you are having.
I'll take a look at the thread and update my colleagues on it.
Thank you for your understanding.