Yeah, for succubi and drifters outside of the DLC, the buffs are randomly generated at the time you take the photo. Like, if you take a photo 3x at the same turn, it will generate different buffs each time as well (depending on luck). The fact that they are random is what makes the photos so overpowered actually. You can farm/grind until you get really good buffs per photo (for example, one photo with: +50% Luxurious Hit Power, +40% Luxirous Hit Power, +50% Mood).
Btw, if you're trying to take photos of every succubus and drifter, at some point new photos will stop being saved in the Album tab. Not sure what's the exact number cap, though. As far as I'm aware, there's no legitimate way to get Album to 100%.