GMS v137 - Unleashed

I'm still really confused as to how to determine the actual HP of certain bosses from these extractions. The following for example look strange to me:

Chaos Blue Pierre [2,100,000,000 --> 315,000,000]
Crimson Queen [315,000,000 --> 2,100,000,000]
Chaos Crimson Queen [2,100,000,000]
All Cygnus V2's [600,000,000 --> 2,100,000,000]
Shinsoo [70,000,000 --> 2,100,000,000]
Cygnus [2,100,000,000]
Chaos Vellum [2,100,000,000 --> 210,000,000]

I'd imagine that these are not the actual HP's of the bosses, so how can I figure out what they really are?