Monster Hunter Freedom Unite weird glitch help?

Okay me and a friend finally started guild quests togethter. but we noticed all of the lesser monsters like giaprey, genprey, or any monster that isn't a "boss" (rathian, yian kut ku, etc) isn't synced up. Like he will be hitting one on his psp but on my screen he is hitting thin air and the real monsters on my screen are on the other side of the area or are fighting somewhere else, or vice versa, it will happen to both of our psp's. Also about the 3rd or 4th boss quest we did we noticed that the boss will pop on the map with a paintball, BEFORE we have even encountered it! sometimes it will stay on the map and show its location for 10-30 sec then dissapear. Other times more or less time, what is wrong with our games, because it happens to both of our games.