A stretch back I got a monsterpackage from a French site which had your dragons on it; I'm assuming you released it at some point. Naturally, loved the dragons and put them on a map and only one server I know of hosts that map now but they never tried it until about a month ago and I just happened to be on at the time.
Offline, the dragons play great. Online...
...not so much.
What you're seeing here are fireballs that the dragons fired stuck in midair. The dragons' attacks were invisible during the game but their initial point of firing a stream of fireballs only popped off one fireball that stayed exactly where it originated.
Skimming this thread I don't see if you tried your dragons in an online setup, unless I missed it. Like I said, this doesn't happen when you play the map offline. Do you think maybe it was the person's server that caused this or can you think of anything else?