We've got a layout where a certain Document contains other Documents. When rearranging the order of the nested (inner) Documents and then floating the outer Document the inner Documents are reset to their initial position, except the active Document which always ends up at the first position.
 
I realize that the layout is maybe not so common, and Iv'e tried to find the correct place to look for a fix/hack in the code but haven't found the right place...