This is happening in two documents and in two places...
A two column span caption followed by a two column span table causes the table to keep jumping from right under the caption to the next page whenever I make any change on a page preceding them. Sound confusing, I'm sure.
Clearer... when one two column span paragraph (with a table) follows another two column span paragraph, depending on what I change before the table jumps ahead and then back after the next edit.
Driving me nuts. I've tried every imaginable keep option!