Collectible Card Game Headquarters

Describe the Bug:
1- Not of This World didn't stop Pyre Zombie activated ability from dealing damage to my Voracious Cobra.Also didn't counter Oust targeting my Jade Leech on another game.
2- In the above scenario I played Not of This World for free although Voracious Cobra didn't have 7 or bigger power.(I had on play a 10/10 Ulamog if it matters).
3- Not of This World stays on the battlefield after resolution.

Which card did behave improperly ?
Not of This World

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
Manalink 2015/3/25: Fate Reforged,duel

What exactly should be the correct behavior/interaction ?
1- Not of This World counters abilities targeting a permanent it owners control..
2- It is played for free only if the spell,ability targets a creature with 7 or more power you control.
3- It is an instant so it doesn't stay on the battlefield.

Are any other cards possibly affected by this bug ?
-

(Plus, it can't counter triggered abilities, just activated ones.)

Fixed in 489bff1, apart from the bug mentioned by Korath which actually we can't fix.

functions properly but never costs any mana

Fixed in 994e850

1- Now in Manalink dev 778ccb5 version Not of This World still is cast for free if you have 7 mana available.
2- If you don't have 7 mana available can't be cast for free even if your creature with 7 or more power is targeted.