I would like to clarify/confirm a couple of issues please
1) In the case of the enemy having the initiative in the ensuing battle the defence before the attack applies only for the first round.On the second round it reverts back to the pattern attack first then defend? So in essense there are two consecutive attacks in the end of the first round to the beginning of the second).Is my understanding correct?
No; Attack and Defense are always alternated. If you have Initiative, it goes Attack-Defense-Attack-Defense; if the enemy does, it goes Defense-Attack-Defense-Attack and so-on. Note that the process of checking for isolation, moving units to the frontline, etc., always happens at the end of the Defense Round, regardless of who has initiative.
2) If Agricola is present can he keep the tactical advantage even if didn't have the initiative in the battle? Is that correct?
Yes, Agricola gives you tactical advantage even when the enemy has Initiative-- which would only be when Mons Graupius is triggered, or when an enemy Leader is present in the actual map box where the battle is taking place.