It was Jeff Garzik who created bitcointalk.org in 2011. Satoshi did not create bitcointalk.org. Bitcointalk.org was a clone of bitcoin.org. Give me a reference of satoshi or any high ranking members before 2011 talking about "bitcointalk".
Logically, you are right, but technically speaking, Bitcointalk is the same as it was when Satoshi started the Bitcoin forum.
While Satoshi did not register the domain name 'bitcointalk.org,' he certainly initiated and created the forum. It still exists today, having migrated from SourceForge.net SMF to 'bitcointalk.org.'
Consider this: how much has the 'Bitcoin' software changed or improved since Satoshi's time? Quite a lot. Yet, we still refer to it as Satoshi's creation, regardless of the enhancements made. Similarly, Bitcointalk.org serves as a gateway to the original forum that Satoshi initiated and created.