UD/SP split bonus

I put together a UD/SP deck just now, and it "tells" me to choose only one bonus instead of automatically giving two. What's up with that?

 

Do you speak about the Avatar?
if not, could you elavorate or share a screenshot

 

I just put together my first SP/UD split BG to test equipment and relics in single-player. As you can see, I did not get half-bonuses for both factions.
Played two skirmish games, and I only got one half-bonus, not two, in each game.

Also, there is no option to choose an Avatar: when you choose one of the half-bonuses, the corresponding Avatar is automatically selected.

 

Cleansing emerald isnt SP.

 

Never mind. I had Cleansing Emerald there, which turned out to be ST/KF rune, not SP/KF rune, as I thought. I was mislead by 15/15 numbers at the bottom.