For the videos you create with Share, are you sure that it isn't the last one to two seconds of the audio being cut off, and not that the audio is faster than the video.
If so, split the audio from the clip, then share the audio to a WAV file. Replace the audio on the timeline with the WAV file. Then try sharing to a video again. I think that will keep the last couple seconds from being cut off.
MotionStudio 3D 1.0; Corel VideoStudio Pro 18.104.22.168 (Ultimate)(Discs), Corel PaintShop Pro 22.214.171.124 (Download)