First off I am a total noob at running my own server. That being said, I noticed that while running the automated event plugin mutliple apcs and cargo ships were spawning even though I only wanted one each to spawn. Also the heli was coming out to patrol every 15 to 30min even though I had it set to patrol every hour to 2 hours. Also the heli refuel, pilot eject and plane crash kept going back to false even though i set them to true. I ended up having to turn the plugin off. Wasnt sure if it was something I did wrong or if the plugin was just acting wonky.
Multiple events spawning
Did you set the limits for them? Did you set them to spawn such that they overlapped? It sounds like a config issue. Give the description another read for how the various parameters affect operation.