Your form is still using positioned content in the subform objects, the content will only expand if it is set to flowed.
This means for your layout you have to use the margins to position your content, you also need to have your field and labels in the same order as the document flow.
I've done the first page for you, I hope you see what I mean.
This looks like you missed a Content: Flowed somewhere in the form structure.
You could also check that "Preview Adobe XML Form As" is set to Dynamic under Edit ... Preferences ... Preview.
You might also have trouble if you started your form from a imported document from InDesign or similar.
If you can share your form, add a link to this thread and I'll have a look.
There is a Expand to fit option on the Layout tab of the text field object palette, make sure this is set.
Then work up the form structure and make sure all the parent subforms have content set to Flowed and Allow Page Break within Content.
Thanks for your quick reply. I send you the form as attachment. I intended to create flexible forms in the form. When I understand correctly, it should be possible to write as much text as needed in the field and the field will automatically increase that the full text is visible. The fields thereunder would move down automatically.
I my form not the full text is visible and the fields to not move.
Your assistance is highly appreciated.