I was doing some preliminary layout (in Chrome 19.0.1084.41) for a possible one-shot campaign, when I hit the end of the line while making New Pages and naming them in advance.
That's when I hit the 9th new page, and as I hit new page, the Untitled page popped up in the middle of the stack, displacing one of the ones I had already named to the end of the stack. So I moved them around to fix the order, and created another new one, scrolling off the page to look for it... and it didn't show up. Instead, the 7th page I'd already made (the initial page plus 6) suddenly popped to the end, while the Untitled took up the second spot. Then I noticed several of them were out of order. Fixed it manually, left the campaign and re-opened; everything fine. Hit Create New Page, and this time it popped up at the end.
It looks like it either suddenly displays them out of order, or its actually changing their positions in the order when a new page is made... but seemingly at random.