View Weights are Not Being Saved

I am following the instructions in #356781: How to reorder your Flagged content in order to reorder my "flagged" content. It doesn't seem that the weights are being saved correctly.

I have flagged three nodes, and then I view the page created by this view (flag_bookmarks), and I try to change the order, and then I hit save. When the page loads after saving, the items are usually not in the order that I specified. I think I got it to work once by moving all 3 items into a different position, but even that doesn't work consistently. What's going on?

Here's what I've got:
Flag module, version 6.x-1.1
Flag Weights Module, version 6.x-1.x-dev (that came out on September 29th, 2009)
Draggable Views Module, version 6.x-3.x-dev (that came out on November 1, 2009)

A couple weeks ago, when I was working on this project, I noticed that if I made the weight appear as a dropdown in the view, that the number of weight values would not add-up to the amount of items (nodes) listed in the view.