It's not the first time that an off hand comment made earlier in the series painted themselves into a corner, causing them to tap dance around it or outright ignoring it. Consider the Sith 'Rule of Two'. Though that I think was at least partially misinterpreting the line to people thinking there were only ever two Sith, period. Instead of just a master/apprentice relationship where if you saw one Sith, another was involved as well. Even back to the original trilogy you had Palpatine and Vader wanting to convert Luke, which would have broke it. In the prequels there was Sidious, Maul and Count Dooku all as Sith at the same time Palpatine was trying to tempt Anakin. Yes technically Dooku didn't show up until after Maul was dead... And Anakin didn't 'fall to the dark side' until after he killed Dooku. But that's what I mean about 'tap dancing around'. More directly you have Asajj Ventress and the Inquisitors, who they go out of their way of saying aren't Sith... Even though they are dark side force users trained by Sith. So they're getting off by a technicality of 'You are not a Jedi because I refuse to admit you are a Jedi, even through you were trained by one to become just like one.'
Ahsoka was a Jedi. A padawan is still a Jedi. But she left the ranks to go her own way after they tried to set her up to go to jail. Technically it was one Jedi in particular, but everyone else was totally ready to throw her under the bus.