The Wolverine Trilogy Title Analysis
It makes sense.
X-Men Origins: Wolverine ----> Original Timeline
It works as perfect prequel to the original trilogy. It's both the birth of "Wolverine" and an X-Men prequel.
The Wolverine ---- Second Timeline (Intermedium)
The X-Men disbanded years before, Wolverine is alone and more feral. He must fight to be Wolverine again.
Logan ----> Third Timeline (Post-DOFP)
The Death of Wolverine and the "rebirth" of a more human Logan.
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The X-Men timeline was altered 2 times, not just one (DOFP).
FIRST CLASS was already a "divergence".
Everything is explained here:
THE X-MEN CINEMATIC TIMELINES
http://x-continuity.blogspot.com