So I just noticed that the Curry Favor action card has the Support symbol in the upper left corner, but the component list says it's a Blessing/Divine card. I was going to ask which one was correct, but the more important question really is: are these symbols used for anything other than organization?
Do the skill card icons have mechanical effect?
The icon on the upper left of an action card counts as a trait for that card (Anatomy of an Action Card, pg 49 main rules), and as such the card they use for their example, Troll-Feller Strike has two triats, the "Slayer" trait listed on the card, and "Melee " because it has the melee icon in its upper left corner. Other than counting as a trait, the icon has no further effect. just as traits have no further effect, other than allowing other actions to interact with it.