Is it normal to occasionally break out on Spironolactone or should you be 100% clear?

I love Spironolactone! It changed my life. I've been taking is since I was 16 (I am 20 now), and for the most part, it has worked wonders. However, I occasionally bump up my dosage (150 mg now with no side effects) if I experience a break out. When I say breakout, I mean 3-4 pimple a month - not cystic and usually around my period. I'm scared that my face will go back to pre-spiro. Is that possible and is it normal to not be 100% clear after a certain amount of time on the medication. Thanks!