I tried out E4X for SOASE Rebellion (a great game, by the way) and the Galaxy Forge editor that came with it.
I planned to spawn ancient structures on some planets, but for some reason, the template for the Fucanglong Hyper Reactor (ancient energy harvester) is missing, yet the entity is visible in the right hand side of the screen.
I don't know what is going on.....
To make it short, the ancient entity that the arrow is pointing at is not within the circled entities on the left.