I asked this very questions as well since I got confused. Berossus is a good example. He begun as a Captain of the 2nd Grand Company in the novella The Crimson Fist. Due to his failure in that novel he is hurt and intombed as a Dread. He is credited however to be the Warsmith of the 2nd Grand Battalion in Angel Exterminatus. The use of Grand Companies have disappeared completely from this novel despite being used pretty much every elsewhere.
In that novel we only have Forrix as the First Captain. Everyone else is credited either as a Warsmith (the equalence of a Captain) or a Lieutenant. I understand that Graham wanted to give the Legion a more personal Legion set-up but screwed with the previous stories. In the same novel he managed to mix up the EC Captains and what Companies they are supposed to belong to, when comparing between The Reflection Crack'd and Angel Exterminatus.
The same structure change can be said when in Fallen Angels, the Dark Angels have Chapters, but in Savage Weapons they have Orders.
In that novel we only have Forrix as the First Captain. Everyone else is credited either as a Warsmith (the equalence of a Captain) or a Lieutenant. I understand that Graham wanted to give the Legion a more personal Legion set-up but screwed with the previous stories. In the same novel he managed to mix up the EC Captains and what Companies they are supposed to belong to, when comparing between The Reflection Crack'd and Angel Exterminatus.
The same structure change can be said when in Fallen Angels, the Dark Angels have Chapters, but in Savage Weapons they have Orders.