I wish to remove all audio from a set of clips. Working on each clip in turn (starting at the last one on the timeline) I follow the procedure : Highlight relevant audio clip > Right Click > Select Group > Remove from Group. The audio disappears okay when I hit the Delete key. However, everything shifts down to the left. I cannot figure out what is happening. The video part of the clip is still visible but figuring out what has made the whole video shorter is a mystery. I am reluctant to go further in case I destroy two days work. I have undone the removal and redone it - but this time have tried to move the unlinked audio. Everything, including the related video and end titles move to the right as if the audio was still grouped. Any ideas ?