Article 1/2012 discusses how exercise may convert white fat (bad) to brown fat (good). The title is a bit misleading, since the study does NOT suggest that "exercise helps you lose weight." A quote from the article:
"Why, for instance, if exercise increases levels of irisin and irisin increases the bodyís stores of energy-burning brown fat, does exercise so rarely produce significant weight loss? The mice injected with irisin lost little weight. On the other hand, Dr. Spiegelman notes, they resisted weight gain, even on a high-fat diet, and their blood sugar levels remained stable. So it would seem that exercise, through the actions of irisin, can render you healthy, if not svelte."
Article 11/23/2011 discusses how exercise might mitigate one particular gene which might increase the risk of obesity by 12%. It is not saying that "exercise helps you lose weight." She's trying to suggest that if your family is heavy, that does not guarantee that you will be heavy as well.
Article 11/12/2011 points out how people who exercise are likely to gain less weight from the Holiday Binge than people who do not exercise. Again, the point is that once you've got the better dietary habits down, exercise can help you control weight.
So yeah, it's fairly consistent. I guess you actually have to read the articles, rather than the titles and/or cherry-pick sentences, to figure that out....