Sorry, but the system makes a ton of sense.
If militia rallies, then it does it at the BEGINNING of the turn, i.e. after combat. It's been like that for what? 10 years? The purpose is to make it predictable. DURING the turn, when you are giving your orders, you know which militia units have rallied and which ones haven't, so you can plan accordingly.
It does make sense that they rally individually. After all, this is what being scattered means: They've lost contact to central command. Sure there is some kind of local commander, but he's not with the individual unit. He's probably hiding somewhere else in the woods. After rallying, those units that did rally will again fight together as an army on the battlefield, but there's simply no way for the various scattered troops to know WHEN to rally. Because they are - doh - scattered.
