Alter Mind

Q: If the caster is human and the target is orc, are they of the same creature type?

Yes. They're both humanoids.

The enchantment table includes humanoids in entry 3 in case you use a non-humanoid arcanist.

Enchantment Mastery Example

The example does not include choosing a range in the calculation of mana and mastery costs. This is an error; the range should have been included.