HD Video - Audio & Video Plays Separately or Overlaps

I shot some HD Video this past week. My Camera is a Sony HD HandyCam (AVCHD). After importing the video into my Macbook Pro 2.53GHz, the video is sluggish, and audio from other parts of the clip are playing instead of the audio that should accompany the actual video! At first I thought this was a problem with the camera, but I also have a JVC Everio GZ-HD3U and the same thing is happening.
I'm using a 500 Gig external HD via USB to store the video. Can anyone shed some light on why the right audio is not sync'd with video and why the video is so incredibly slow? Lastly I'm shooting 16.9 and exporting the Video as H.264 Mpeg4.

You do not say how you captured the video, but it sounds like you didn't capture it with Premiere Elements but instead used other software (the software that came with the camcorder?) to capture it to your computer.
If you use Premiere Elements 7 to capture AVCHD, it will open the Media Downloader so that you can bring the video in as files from the camcorder's hard drive. That could make the difference.

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HD Video - Audio & Video Plays Separately or Overlaps

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