Studio 10. I have now created 3 manual controlled presentations which feature stills and a few videos from old cine. Separated audio from video to give me control of audio sound level. Used these talks to different groups, no problems. Updated software few days ago. Producing new talk which includes just two videos and whether I separate audio or not the audio keeps moving away from appropriate slide even though checked that it is linked with correct numbered slide. Checked all my settings. What have I done wrong?