Actually, the design is as follows:
Selecting:
* if you are not on a page at the moment, a single click on a page tab takes
you to that page
* if you are currently on a page and you click its tab, it selects the
entire page
* once a page is selected (bold blue outline), if it is a main page in a
group, and if you single click again, the whole group will be selected.
Moving:
* If you click on the page tab of a page that is *not* selected, then
holding the mouse button down while moving up or down does a "riffle",
similar to putting your thumb on a stack of paper and flipping through all
the pages. This is a nice way to visually see all the pages in a section
easily to locate something by how it looks.
* If you click on a page tab of a page (or page group) that *is* selected,
then moving up or down will move that page (or page group) - look for the
little black arrow to show you where the pages will be dropped. You can only
drag/drop pages within a section in 2003. Yes, we know people want full
drag/drop.
* If you click on the page tab of a page that is *not* selected, then moving
right or left first pulls the page "out of the stack", and lets you
drag/drop as if you had first selected the page.
Chris Pratley (MS)
OneNote design team