I have been battling with my level 28 shoyru for a while, and when I use shoyru inferno, it only does 4 icons - not six like it's supposed to!
Why is this???

Did the IDB staff make a mistake or something?
Theres a good chance neo has changed them as of late. They are constantly tweaking the battledome around. It is impossible for the IDB staff to stay on top of everything =)
I dont get why you say that ._.
The "up arrows" mean that that portion of the attack appears once you get higher on level.
In IDB main shows that first you get 4, then in upper levels you get 5, then 6. So, it doesnt say it does 6 right away, as i suppose you're thinking

(you have to go upper on level to get more icons for that ability).
Edit: Oh, i forgot, it doesnt say exactly at what levels your ability increases its attack icons tho

I figured that out myself, but thank you if you posted anyway!