Help. I need immediate assistance if possible as I was right in the middle of a shoot. My duo-cable release on the 30th frame of a 36exp. roll has just started to misfire. I am set at 'Bulb' and using 10,15,30 sec. exposures. I have been using it for years and yesterday it was working fine, and today up until #30. I shoot a frame, pull the lever and at that point I hear it firing again... like a double exposure. are the shutters perhaps out of sync? I have been using the release end needle pushed all the way out (that's was the indicator originally I needed to be set at)... do you think all I need to do is recalibrate the shutters? I hope it's not the slow speeds on the camera going out on me... Using an OM2 with bellows. I hope it's an easy solution as I am in the middle of a project and my backup OM2 isn't working... and yes, I need to pick up another OM2 very soon. Hope someone can help.... Thanks. ps. I hope this is the correct forum for this.