Silver Knights ability didn't seem to function

[Duxor]

I was playing campaign battle 4-1 against three Centaur Warriors. I put in the Silver Knight to take advantage of his ability since all of the Centaur Warriors have heavy armor. The Centaur Warriors have a cool down time of 8. A text came up indicating that the Silver Knights cool down time was reduced by three (thereby taking it down to 7). Yet I think the Centaur Warriors all attacked me first.

[Floyd]

If you got the text saying that cooldown was reduced, the ability worked just fine.

You have to notice that Centaur Warrior attack target is random and cards with this type of attack have a 25% cooldown exemption at the start of the battle. Thus they first attacked at 6, before your Knights at 7.