12 Hero's from a 10 pull, no HOTM!

I used a 10 pull this afternoon 16:05 local time and got 12 hero’s? You would expect to get 10 hero’s and 2 HOTM’s. But I just got 12 random hero’s. Isn’t this a bug?
And how reliable are the summons then?
I will include a screenshot.

No bug, you got 10 heroes + 2 costumes.


Thanx, you are right.