Gnomish racial "Shortblade Specialization" gives +1% bonus hit twice for casters, on Armory and API.
For example, if a gnome has 14% hit + 1% from shortblade specialization in game, on Armory it will show that he/she has 15% hit + 1% from racial. In API report, it shows as 14% melee hit and 16% spell hit.

example:
http://us.battle.net/api/wow/character/Kael%27thas/Whatwasthat?fields=stats