All that chaos with the mutated creatures is intended, once a creature successfully becomes a mutant it will keep mutating every time a copy is made.
I think it is in line with the entropy style and it is fun.

Photosynthesis too is intentionally usable multiple times, as described on "rustler" card.

I understand is kind of confusing when mutant creatures have skill not described in the card, but, well, that's part of the entropy game and that is where experienced players get the most out of mutation.

The spinning wheel follows "slot machine" rules so, yes, it is intended that only if the first two are the same you get the extra coin