Nono… There was no mistake there.
Before the Clone Wars, there were lots of Jedi everywhere in the Galaxy, and only a couple of Sith.
Anakin did bring balance.
Nope, Lucas meant the dark side being wiped out.
Lucas’ intention was that Anakin brought balance, eventually, by killing Palpatine and then himself rejecting the dark side. Thus wiping out the Sith.
What he intended and what he showed us are two different things. By the end of ROTJ, there were no more Sith and no real Jedi left. Luke called himself a Jedi, but didn’t really follow the strict rules and didn’t completely shun the dark side. He simply used it without anger. At that point, balance was truly restored.
The idea of the prophecy and balance with Anakin as the chosen one hadn’t been thought of when ROTJ was made.
By the time Lucas had come up with the prophecy, the EU had established Luke in the post-ROTJ as unquestionably a Jedi. Luke rejected the dogmatic aspects of the old Jedi order as early as Empire Strikes back, and as more EU material was written he continued that trend, building a new Jedi order in the model of his ideas. However rejecting specific old organizational dogma can be seen as stripping away the excess bloat of a system and finding the “true” core of it. Think of Luke as a religious reformist in a way, rejecting the institutions of a religion while not rejecting the religion itself. He was Martin Luther with a lightsaber.
Oops. Forgot to add /s at the end.
Still, thanks for the link. An interesting read.