The only thing I found odd was Michele's "who could've guessed I'd be on the same tribe as my ex-boyfriend?" when it's like, uh, you're both part of a select group of 39 Survivor winners, and you're both on a 20-person cast. The odds aren't that astronomical. If anything, given this drama, I would've expected the show to put Michele and Wendell on the same tribe on day one.
Besides that, Michele didn't come off "catty" or unusual at all. If anything, it seemed like the show took her side to some extent, in whatever the acrimony was between her and Wendell. She got multiple confessionals about it, even Parvati got a lot of time to discuss it, and Wendell's only comment was the "you know, we kicked it" confessional. He couldn't have looked less comfortable discussing the topic.
I was wondering after last week's preview if Michele and Wendell's relationship was common knowledge to any other players, and so far we only know that Parvati knows. It'll be interesting to see if or how Nick and Yul react if they learn the news, if they don't already know. They could consider it shady of Wendell if he didn't fill them in upon being grouped onto a tribe with Michele.