So I'm not sure if this is a bug or not. I reverse engineered the Galactic Annihilator (Premium Assault Cannon, Level 50). I learned the Overkill Galactic Annihilator and the Critical Galactic Annihilator schematics. I wanted to learn the Artifact versions of the Overkill Galactic Annihilator so I reverse engineered it a few time and learned the Artifact "Commander's" version, but 40 more reverse engineered Overkill Galactic Annihilators and that still the only Artifact version I know. Is this a bug? It's never taken me this long to learn another version.