A skill answers to the id the game publishes and to its slug, and a name is
slugged before it is tried, so /training-skills/axe and
/training-skills/Axe Fighting are the same skill. The id wins where the two
collide.

The two handles are different strings on five of the six skills, the game
keying on the bare skill and naming it … Fighting or Magic Level.
shielding is the one where they agree.