I think you are correct. Since unchecking the Swipe between pages option, I'm not noticing all that jiggling.
That said, I would like to keep that feature on so my question is how to do that without having constant side to side movement? Better yet, what is causing it? Is it simply my touching the Magic Mouse, and the slightest touch causing undesired movement? Do open windows need to be wider to some "full width?"
Thanks for the tip. Any additional help is appreciated.