I just noticed that under 'Personal Details' I can set my gender with the radio-button near the top (Male | Female | Unspecified) and then once more at the bottom in a drop-down list. Evidently, the fact that it is there twice does no harm whatsoever, but I thought I'd throw this out here anyway.
When I switched the radio button to female, it showed female on my profile, so I guess that's the only value that will be taken into account.
Hey guys, thanks for brining this to my attention. It's a remnant of the software upgrade a few months back. Unfortunately, for the time being, I don't know how to delete one without losing all it's data. So if I delete one, it'd lose all data before the upgrade or after. Due to this, I've chosen to leave them both there until I can figure out a solution - which probably won't come until I make some improvements to the profiles in general. But thanks for pointing it out!