Starting Hand Profitability Skewed?

[tikipirate]

Please move if this is more appropriate elsewhere.

I realize the sample size is not nearly significant enough to draw any conclusions from, but over 15K hands in PT I have one starting hand, KK, that is 2x more profitable net and in bbs per hand than my next most profitable hand, AA. KK represents almost 40% of my net profits. The rest of the hands follow a distribution I would expect (AA on down). Should I be concerned? Is this just a statistical anomaly that I can expect to change as I play more hands? Thanks.