The thumbnail pane is now only useful for navigation to a page. Apple indicates that they will restore some of the lost thumbnail pane functionality in the first half of this year.
I have no idea what you mean by: "There are times when I can insert a page and other times I get insert Page Break. I don't want a page break."
Unfortunately I am feel wronged me by Apple.
The new pages is really too bad.
I was already feeling bad because of incompatibilities of other products such as Iphone. Apple does everything to make obsolete the products as quickly as possible to get you to buy a new one.
I migrated from iPhone to Android and am very pleased with my Sansung Galaxy 4.
Now I am leaving the PAGES and I use LibreOffice.