See that wasn't so hard.  If you want people to answer you then you should actually spell out what it is you're trying to say rather than grunting like a caveman.  I don't know honestly I don't mine in coins other than BTC, but that does look strange to me though.

Crackfoo will likely have to answer what is going on.  Although the payout in other coins feature does say it has had minimal testing so use at your own risk.  We'll have to see what crackfoo says about it.

If I had to take a guess it is that you are still internally recorded as paying out the BTC value and not the actual coins and then depending on price fluctuations the amount of coins you get may vary.

So you didn't really mine 3.492684 MAC as far as the pool is concerned you actually mined .00679 mBTC worth of value that is worth 2.52570141 MAC right now.  I'd wait until those block fully mature and you see how much MAC you actually get.