You're right. I thought he lost a few more at LW after he lost to RDA, but he moved up right after that. He was ranked #4 going in, so maybe he drops a spot or 2. But still far from #10.
I disagree he has nothing to gain from Poirier, though. Poirier is the #3 ranked LW in the world. If Conor beats him, then I don't see how anyone could complain about him getting another title shot.
I also disagree Cowboy is an easier fight than Poirier. First, we know Conor can beat Poirier since he did it already. We don't know about Cowboy. But second, Poirier is basically another Alvarez and we saw what Conor did to Eddie. Sure he's got some wrestling, but he has more KO's than submissions. Cowboy though, has better kicks and a better submission attack. Whether he used it or not is another story, but he has the potential to give Conor real problems on the ground. Cowboy is also the taller and naturally bigger guy than Poirier.
I'm kind of arguing against myself, though. I'd love to see Cowboy-Conor because like I said, it's a fun fight and I'd love to see Cowboy get a big payday.