Page Builder goes to wrong page

I have a registration page that works ok but when I try to edit it with Page Builder it literally goes to a different page. It goes to a page that also is called Registration but had a default form in it (which I deleted). In the list of “all pages” in editing mode, there is only one registration page. Why is Page builder directing me to a page that isn’t even listed in my list? Why can’t I edit my correct Registration page with Page Builder or any other way? I’m really starting to get a strong dislike for Word Press!