Pdf form order of field calculation

Hi,
I have a Problem with PDF Architect9: In my slefmade PDF form some auto-calculated fields do the calculation not directly but one or two steps to late. The order of Tabstops is right, but:
Where can I change order of field calculation? I think in Acrobat this would be possible. In Architect too?
Or do you have any other ideas to solve the problem?
Thank you very much!