Self expanding text boxes

Hi,

I'm creating a fillable form with self expanding text boxes, but can't seem to get it right. The boxes expand, but overflow to the text below, plus do not expand onto the next page. I have posted the file for you to look at it.Hopefully I've done it correctly. Once I figure out the first, I'm sure I'll be able to figure out the rest.

Thanks in advance.

Phil

Here is a link to the form.

https://acrobat.com/#d=vz71uahGbolI0DkjAAUKqA