[Yen]

Not too sure how to explain this bug. I've had some complaints about it on Zodiac, recently.

In commonly used inside levels (doesn't occur on gmaps), such as dungeons, you will see multiple arrows being fired simutaneously when you enter.
I'm guessing that the projectiles aren't being cleared from the level properly, so you're seeing a bunch of projectiles that were shot a while ago when you enter. Once you've entered the level once, you won't see the arrows shot again until you relog.

EDIT: These 'ghost projectiles' don't hold any params, as well.