on the pets pages there's still info about the last exhibition - with styles "classic", "modern", etc., even though it's already over and the new exhibition is running, is it a glitch or it will just stay there for ever?

It was the same with the cockatrice poison types, those were visible for a few weeks. Until the next exhibition of the same type was started. 

Actually, I kinda wish that they were permanent. Gives the pets some extra character. I found it amusing that my Pestilence kami was into folk music, and really bad at it.

^lmao that was insanely amusing.