Slow motion battles

[Sp4]

It never happens on disembarking for me. If the AI navy gets into the battle without it slowing down horribly, it will be alright. If it slows down, it does it as soon as the AI navy joins the battle.

-E- While I am here... how do I turn off the advisor in battle? Or make it so he only tells me stuff like the enemy general is dead rather than a window popping up telling me? I've already tried to turn it off with the settings button in the actual window but it always keeps coming back >.<