Population is in between ruler current stats and original. Military you can list on your own below the other posts, or below population. Some people maintain their original posts and some people don't so that's up to the individual. Either way, Wayland will be mainly updating from your actions. Listing your military somewhere might help him, so I'd be more inclined to suggest upkeeping it.
You can start this round, or you can wait, as you wish. This round you'll be rushing, but you can. All your actions will be your own, but you can send actions toward other people for them to react next round, for example.