Challenge #8 Liliana - Bug? Mislabeled Card?

[Demented]

During this challenge the player can use a card called Sangrite Surge. The card says it gives a creature +3/+3 and double strike but instead of double strike it gives a creature first strike.

I cleared the blockers and platinum angel and all that was left to attack/block was my Knight of the Skyward Eye and Mistmeadow Skulk. The Knight only does 7 damage (2 + 5 (FIRST STRIKE)) and Mistmeadow does 1 leaving Liliana with 1 Life. Shouldn't the Knight be able to do 10 Damage?

I'd upload a screenshot but imageshack is giving me an error at the moment.

[Demented]

Here's the link.

http://img717.imageshack.us/i/firststrikebug.jpg/

As you can see that's Sangrite Surge in the graveyard, and on the bottom it says FIRST STRIKE even though it should have DOUBLE STRIKE. I don't know if that buff icon on the card reflects Double or First Strike.

[DJ Pirtu]

Most likely the Knight only does so much damage because of the one card that destroys any card that deals damage to the player. I forgot it's name. Terror, Horror or something like that.

The Knight would (propably) attack twice, after its first attack and before the second one, the fore mentioned card destroys it.

[rebmcr]

You have to sac the knight to brion in response to the royal assasin activation anyway, the dread is what is stopping the regular combat damage (it destroys the knight after first strike damage has resolved).

[Icedflameoffire]

http://mtg.wikia.com/wiki/Double_Strike
"A creature with Double Strike deals both first strike and normal combat damage."
The first strike of double strike counts as first strike. The second is just a normal attack.