Yes, I noticed this.  It's one of the (many!) things I dislike about the new version of Italki.  

I think they're making this change on the theory that there's no meaningful difference between native fluency and a C2 level.  To some extent, I can see the argument, because there are plenty of native English speakers who know vastly less about grammar, for instance, than a C2 speaker does.  I assume that Italki's reasoning is that the new system will discourage people from assuming that a person is less proficient in a language just because it is not their native tongue.

I would say, though, that the difference between a native speaker and a C2-level speaker is significant.  Fluent and native are not the same thing.

Also, on the classic version of Italki, if you're on a computer, you can hover your mouse over a person's user image, and you'll see what country they're from and what their language levels are.  On the new Italki, you can't do this, which means if you want to find out where they're from, you have to actually click on their profile.  It seems like Italki is trying to make it harder to find out what languages other users speak.  It seems to me like this will be bad for the Answers forum, where people who post questions usually want to know whether the person answering their question is a native speaker, or at least a fluent speaker, rather than a fellow learner.

(Oops.  Edited to fix a sentence that made no sense.  As John says, we all make mistakes. Especially when we don't proofread. :P)