Inconsistant outcome

[VedalkenBear]

TP: I _have_ had units retreat after, ostensibly, all of the opponent's units are retreating. Generally, this will happen when a few archers on the other side aren't _really_ routing, and they cause a morale check on my unit(s) which fail.

[llamabeast]

Never seen disappearing troops either. Keep the trn file next time you see it.

As for your troops retreating after the enemy are routed: I don't think it's a bug, just chance.

[Agrajag]

If you win, any troops of yours that retreated should be in one of your nearby provinces. This is strange.
Is it possible that all nearby provinces were owned by the enemy at one point during that turn, just not at the end of the turn?
If so, then its possible that sometimes during the middle of the turn your troops really didn't have anywhere to route to and that's when you fought (and thus lost your retreating troops.)