@Harin : well, as i said in my title - maybe my memory is bad, but I recall reordering the naval/military queues as well. The default start has a bunch with one to go, including 'capital' ships.
If I am confusing the queues, then once one factory is assigned - it is ALWAYS assigned. I can only disable/remove factories 2+, OR, I must discard all production semi-completed - rss expended lost.
I am sure I sometime flipped production from capital to submarines or merchant ships - because I needed them more now.
@Corpse Fool : correct, but my goal of changing priority is to get them all to shift now (not be stuck with 5 other things each with one production factor). As I mentioned above: the queues with 2+ are easy to bring down to 1 - regardless of their position - and the freed ones go to higher priority queues that are requesting more production.
I expect the queues to reorganize when I shift them, rather than only when there is more than one queue to shutdown.