In pagetype I added an form in a Area in the output. So when I create a page of that pagetype I get a page with a form.

On some pages I need to edit the form. Is says:
"This block is an alias of the Default Defaults Page. Editing here will "disconnect" The Default values ​​page will no longer affect this block." (quick google translate from dutch).

What I understand it should create a new instance of that form because I manually edit the form on a specific page and it should not affect the forms on other pages that I created.

The problem is when I edit the form on the page (so not in pagetype) it changes all the forms. It should create a new instance? Am i right?