It's no different than hearing hi-hat pedal work. Even then, you might HEAR two bass pedals, but you only have one plugged in, so what you're playing is accurate.
Furthermore, for you pro drummers out there. What's it like, playing a "standard" version of a x2 Bass track? I imagine it to be akin to a Hard guitar chart... where you hear and know there's more going on - at least in terms of bass pedal - but only have to play a fraction of it. Seems doable, just inconvenient if you're playing by ear. But I mean, is it really that big of a hassle to play the standard version when you're forced to?