I have found that if I click in the pages list, then click the plus button and select the page, then quickly click inside the pages list again, it can help get the selection of the page type to stick, sometimes it can take a few tries though.
Your trick helped in that I was finally able to create all the pages. In my testing, a second click after the pages list to outside that area seemed to speed it up a bit. Hope this is fixed soon though. PITA.
Thanks again for the suggestion.