Hello, in regards to the turrets attacking the heavy npcs. You are referring to when a player starts hacking the crate which triggers the chinook with heavies onboard to fly in? Do the turrets attack the heavy npcs every time? I haven't had any other reports of this issue and I haven't been able to recreate it myself so I may need to get some more details from you around this.
As for the chinook blowing up the bradley, that is possible with the default spawn location. However, you can customize the spawn location of the bradley through the config if you'd rather that not be possible.