In the time being, I think it is fairer that we assume they are mixed. Unless, of course, someone has visited over the last month or so and can disprove this.
The general point - that it isn't a unique or groundbreaking mix as @AmazonianHippo suggests - applies no matter what of course; the above query about whether the mix is ongoing was merely an observation borne of my needing to check the Beauval map in order to locate the exhibit on Google Maps (as I've never visited so couldn't do so from memory) and find the overall area covered!