Collectible Card Game Headquarters

Describe the Bug:
1- Circle of Affliction doesn't require to tap mana if you choose to use the trigger. It only needs you to have mana untapped.
2- Bellow ruling doesn't work:
2/1/2007 If the damage reduces you to 0 or less life, you lose the game before Circle of Affliction’s ability has a chance to give you life.
Which card did behave improperly?
Circle of Affliction

Which update are you using? (date, name)Which type? (duel, gauntlet, sealed deck)
Manalink dev 778ccb5 version - duel

What exactly should be the correct behavior/interaction?
1- Circle of Affliction requires to tap mana if you choose to use the trigger.
2- 2/1/2007 If the damage reduces you to 0 or less life, you lose the game before Circle of Affliction’s ability has a chance to give you life.
Which card did behave improperly?

[b]Are any other cards possibly affected by this bug?
-

Manalink only checks for life being zero or less at the end of phases, per the fourth-edition era rules, so ruling two affects many cards and situations. (Being attacked by a creature that you've enchanted with Spirit Link is the canonical example.) Fixing it for just this one card doesn't make any sense.

Trigger cost already fixed in dev.