It is pretty normal. Diva used to not only get zits, but bad acne when she was a puppy - right up until she was nearly two years old. She hasn't had any since then. Monty has never had zits though.
To this day after every meal (morning and evening) I wash Diva's face with a face cloth. :D Yes, I know it sounds daft! The face cloth is only for this purpose and isn't used for anything else. Besides anything else Diva is such a messy eater that it also saves the floors, the walls, the furniture, bedding, my clothes etc! :D