There are aspects of the Western gender roles that are opposed to each other at least to some extent: emotionality vs. stoicism, active vs. passive romantic performance. But there are also aspects that aren't. Blue is not anti-pink. Skill at sewing doesn't forbid skill at fixing cars. These might resolve in people's perceptions to positions on some kind of spectrum of male vs. female presentation, but they won't show up that way on surveys measuring conformity with stereotype.

Indeed, that suggests a possible mechanism for these results. Assume for a moment that people prefer to occupy some particular point on the perception spectrum. But people often like stuff for reasons other than gender coding, so it'll sometimes happen that people will be into stuff with gender coding inconsistent with how they'd prefer to be seen. That creates pressure to take up other stuff with countervailing coding. If people respond to that pressure, the net result is a weak positive correlation between stuff with masculine and feminine coding.