I use this plugin since today and suddenly there is a possibility 2 helicopters appear at the same time (saw this 2 times now) and can come different times. Never happened before.
Standard is only 1 helicopter at a time and appearing in the morning.
I have set:
"2. Patrol Helicopter settings:": {
"1. Disable default spawns": false

Maybe it's the same with the cargo plane. I use Fancy Drop and have set airdrops to come down faster than normal.
But today I could watch at least 1 airdrop fall in normal speed. Never saw this before since I use Fancy Drop.
I have set:
"1. Cargo plane settings:": {
"1. Disable default spawns": false

Last I checked, Fancy Drop handles its own as well, so likely the cause there.

Wait. Fancy Drop handles the helicopter?
But it's only for airdrops.

i have the same problem that 2 helis spawn 

Also I get more than one cargo ships on my map since I have this plugin. Although it is disabled in the config.

i have removed the plugin for now and skip night make no sense to use it atm :(