At request I have uploaded a version 2 that has the extra runways. It does make it a bit crowded, but I like to give people what they want. Left this version as is for those that like it though. I also messed around with the spawns for inbound planes because I think there was an issue with them always loading right when I was testing it. Hopefully that fixes it. As for the yellow destination issue I didn't have it and it's not something the editor lets you control. So hopefully it doesn't keep happening to you.

Yellow spawns endlessly in the exit, but no yellow destination appears. Also if you could get the other 2 runways that'd be fantastic