Oh, I just realized, you probably developed this boss with only single-player compatibility... I'm playing on a multiplayer server, that's probably why the messages are weird.
Also, you need to fix the ore spawning on player made things or trees. I defeated the Neo Mothership and after re-logging I saw some neonium spawned in my lava trap (which was made of wood). It appears that in multiplayer, you don't see the newly spawned ore until you relog, which is probably why my world was absolutely covered in neonium without me knowing.