This correct. Call it "M1X" or whatever, there are two variants of M1 with 12 core and 16 core based on leaks from 8 months ago. I believe one or both of those are what is currently in production, in advance of Pro machines to be released this summer.No. It’s just a random name they made up. It makes zero sense than a new generation of CPU and GPU would come out so soon and debut on the Mac instead of the iPhone in September/October. Not gonna happen.
Whether or not there will be an M2 this fall based on A15 (and I see no immediate reason why there would be) has nothing to do with that is currently being prepared for release.