In the right sidebar, where it says "My Lists" just click edit next to the list you want to work on :). I think you can reorder them that way. I know you can add books.
Yeah I was able to reorder books by dragging and dropping when I clicked to edit my list. This was good because when I originally made the list it did not save the books in the order I added them, so I fixed it today.
Sorry :/ We're still working on this feature. We're now in the process of adding "Hide" option. We'll be also presenting personalized settings for these boxes really soon. So sorry for inconvenience.
And a description box as well will be nice. Thanks ^_^