yes it is a bug.
edit: There is also a bug where training a henchmen at a fortress settkement means you get h elevel bonus without getting a chance to pick traits for levelling. Either a fortress should train a unit at level on and just place the bonuses and health boost on the unit, or a pop up window should go up when a henchmen is trained to pick skills for levelling up. I don't use sions much, but i imagine there is a similar bug with them. I think this will be cleared up in the time before the official release, we will see.
xia did, after all, get his pony. 
edit#2 feel the guilt, feeeel it.
