Just one more thing, said Columbo:
http://en.wiktionary.org/wiki/bug#Verb
Joking aside, a map on a dogfight server can have at least two end conditions in addition to the time limit. One is that either side loses all planes, the other is that all their ground targets are destroyed. After either condition is met, a time out counter starts, typically ranging from 1 to 3 minutes from what I've seen. However, if the second end condition is met during this small time period, the time out counter is reset yet again.
I've seen this reset thing happen only once, and I can't think of any other explanation than two end conditions being shortly met one after another. I can't rule out some flaw in server/map settings either. Well, it's not too
annoying.