Adobe XI Standard - Interactive Forms

I have created some pdf forms with interactive content (i.e. form fields that user can type in). When I edit the document and make changes such as the format of a field or change the tab order manually, I can save the document and come back later and the previous changes are either gone, or those changes are still intact, but other things have now lost their format or tab order change.  I am using Adobe Xi Standard version.  Does anyone have a solution for having to make the same changes over and over?

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