Thread:SnowGem/@comment-27364552-20141112225652/@comment-9970378-20141225010432

I can't say I know for sure, but it could be a result of any of these things or many of these things:
 * 1) It updates on a large delay.
 * 2) It doesn't count fights during clan wars.
 * 3) It doesn't count fights against the admins.
 * 4) It doesn't count fights against deleted users(though probably not this).
 * 5) It doesn't count fights if they were against a user more than 2 levels below you.

I have a feeling it's the last one I mentioned there since the pet achievement has a similar rule to it.