MHFU Ad Hoc sync issues for normal monsters?

Wife and I started playing MHFU tonight and noticed that normal monsters never showed properly on both psps. Essentialy both players had seperate enemies and on each others' screen the other was swinging at thin air. I've read that this is a common problem but I'm curious is it a bug or intentional design, and if it's the former, is there a fix for it?

Bosses seem to work just fine but it still makes for a real disconnect when we're playing to be fighting in what feels like totally seperate worlds at times.

Thx

U guys have to enter the stage at the same time to have the minions in sync... but even if u dnt enter at the same time the minions die on both screens. If u enter a stage and clear ir then reenter and clear it again there will be no more minions after that