Copy and pasting order settings of buy black market entities using shift+righ click and shift+left click will entangle the entities and changing orders of one entity will also apply the change to all other entangled entities.
To reproduce:
- Place down multiple black market buy entities of the same type (eg. buy chests)
- Setup an order (eg. 10 coal) on one of the entities
- Copy and paste the settings of this entity to all other entities using shift+right click and shift+left click
- Change the order (eg. coal -> iron, or 10 -> 20) on one entity
- Check the other entities, they will now show the new orders too
This only applies to orders. Period, Automatic and chest limits are not affected by this.