San Piero is a common, bifara fig. So you are not mistaken. Problem is there is a lot of confusion between San Piero, San Pietro, and San Pedro figs. Question is: do you have an actual SP? Did it die back and make a comeback? Are you overfertilizing it? And lastly, are you familiar with the difference between the breba and main crop figs? It may have produced both but you did not notice it. Hope this helps.