1. Hearts of Steel is an alternate timeline, not part of the main continuity. Conspiracy is a continuation of that timeline. Conspiracy erases itself at the end of the story, but is still the present day of that specific universe.
2. Infestation: Ghostbusters is canon to Dimension Prime. I'm well-aware of this. Infestation is a multiverse IDW event. It's canon to a lot of things.
I was talking about the three universes in question.
1. Ghostbusters Universe (Alt. G1 Transformers exist)
2. Hasbro IDW Universe
3. Hearts of Steel/Infestation 2/Conspiracy Universe