When Photos for OS X finally launched, one of the nice things about it is that it effectively makes a copy of the library on your iPhone, including all the albums you might have. I never really paid much attention to the albums in Photos on my iOS devices, as I never actually created any albums in it. However, some apps do and those albums are synced over too. One of those is for VSCO cam images that you save back to your camera roll from the VSCO cam app.