So I'm shooting last night and my camera is set to bracket 3 shots. It only took 2. Eventually it took 3, but I couldn't figure out what happened. I didn't change any settings to make it do that. Fast forward to today. Shooting in bright light. The camera shutter seems to take about 1 second to complete its cycle. I set it to 1/20th and all the way up 1/4000th and the shutter doesn't seem to be getting any faster. However, when going lower in speed the pictures do get darker indicating that it is working somehow. Anyone know what's going on? It's totally throwing my shooting off..