Corbon & Antistone, who would think that you two would get so upset when I'm not even saying you're wrong? Yes, the reading you support is correct. But it is not the only technically correct reading. It's not even the only reasonable reading, or the only reading that "makes sense" in terms of the game mechanics.
The biggest complaint seems to be that there is a better way to write the rule if it's supposed to mean something else. But there's also a better way to write the rule if it's supposed to mean what you say it does. Here's one very basic re-write:
Original Rule:
For every wound token lost due to a Leech attack, the target also loses 1 fatigue (or suffers 1 additional wound, ignoring armor, if the target is out of fatigue) and the attacker is healed of 1 wound.
Possible Rewrite:
For every wound token lost due to a Leech attack, the attacker is healed of 1 wound. If possible, the target also loses 1 fatigue (or suffers 1 additional wound, ignoring armor, if the target is out of fatigue).
(This certainly isn't the best way to re-write the rule; it's just a way that requires very little alteration of the original rule.)
I feel like we're talking in circles, though, and it seems rather pointless. So I'll leave this thread alone now. Feel free to interpret that as a victory if you wish, though I honestly don't know why you care how people you don't even play with read the rules.