Hey Sandy, why the REALTIME rule?
REAL_TIME
If this rule is used, the game will be processed as soon as the last player submits orders (this player will have no opportunity to modify them). Additionally, players will not be allowed to direct that the game wait for any deadline before processing. This rule is used especially for games with very short deadlines (for example, 10 minutes).
Maybe I haven't thought it through, but this rule sounds like it would be pretty frustrating if you meant to change your orders at a specific time, ie lunch, and instead find that the game processed your "interim" orders insted. I know that I use the "wait until deadline before processing" box a lot, and I'd be screwed up without it.