MagicAnimalCarousel simpler solution?

[politicalnonconformist]

Looking at testSolve in MagicAnimalCarousel.t.sol there is some complicated logic there, while it is enough to simply do

instance.changeAnimal("horse", 1);

because changeAnimal has a line encodedAnimal << 160 while it in fact should be encodedAnimal << 176.
Is this intended or I am missing something?