Hey Guido van den Berg,

As Lian mentioned, the additional +2% training bonus is applied successfully, which is what the +2% label below each training bonus indicates. What's different is its visual representation - when you activate one of the four bonuses, the 2% no longer gets added to the activated bonus number, but it's still active as the label confirms (meaning you have 15% + 2% possession bonus). I see how this might have been confusing though. Hope this clarifies it!