Lost Logic when a Page is added

Lost Logic when a Page is added

I have created a Survey and tested the Logic and it worked fine.
I then added a page and moved questions from one page to another.
In doing this I lost the logic for the questions that had been moved from one page to another.
I have set the Logic in the question but when I Preview the questions they now do not work.

Is this a problem with Survey that once you move questions between pages it does something to the Logic?

The Survey has over 50 questions with lots of Logic and I was hoping to get this Survey out in the next 48 hours so I would appreciate an answer as soon as possible.
Thanks