Today when shooting my Stoeger Uplander Supreme I could not get a fallow up shot because after I fired my first shot, the safety switch would slip forward not allowing me to fire my other barrel. This is the first time this has ever happened. I was shooting the bulk 12 ga Winchester ammo from Walmart. A few days ago I accidently pulled both triggers at the same time with Remington Nitro Pheasant loads, would that have damaged the gun? What should I do?