I am a noob at this, and really have no idea, so I am simply posting some observations. I had a look at the stats and noticed that your win% on those 2 spots are also the highest 22.79% on button, and 27.34% on BB. I think that is quite ironic seeing as you are winning the most hands in those positions, but losing the most money.
Could this be that you are winning a lot in that position because you are being very aggressive and doing huge raises, thereby chasing everyone out of the pot most of the time (resulting in a small pot to win). When someone else at the table actually has a hand though, they are calling those aggressive raises, which results in the pot being very large (and subsequently a huge loss to yourself when they win)? Just a thought, perhaps it will help one of the more experienced poker players analyze the data for you.
Another thing I noted is that you have more hands played in those positions than the other positions. Did you have a couple of sessions of heads up play that cost you a lot?