Reported: Casting a skill from Lua by name or id casts a different one: Radiant Fall casts Focus, Frost Arrow casts Velocity, Entangle casts Blind Sight, on RF Golden Age.
Found: These are forces. The server knows each force by the number the game client gives it, which follows on from the character's item numbers. GoMMO Client sent the force's position in the force list instead, and on a character with few items that position is the number of a different force.
Fix: GoMMO Client now sends each force under the same number the game client uses, for the forces downloaded at login and for those learned later. This is in the next GoMMO Client update, for every RF version it supports.