As a programmer I have a tonne of icons pinned to my Task Bar (Visual Studios / 5 Different Browsers / Etc...)
When you reach enough icons to fill the bar it flips the rest onto a 2nd page that they let you scroll through with a little scrollbar.
You can easily re-order anything on any given page by dragging the icon but I cannot for the life of me figure out how to get something to go from page 1 to page 2 without putting it at the front of page 2 and closing something on page 1.
This is problematic and I'd be surprised if there isn't a way to do this normally.