This week I corrected a mistake that I made years ago when I traded my first P89. I finally found the right one to replace it that is NIB. The thing that has me scratching my head is that there is only a decocker lever on the left side (which is fine by me). I've seen photos of the same gun in that configuration but it seems that the vast majority have the decocker lever on both sides. Does anyone know if the single lever on the left side was a factory option?