Why is audio out-of-synch with video on VOB files

I used a Pioneer DVR to import ~120 8mm and Hi8mm and Digital8 analog tapes to convert them to DVD's. These ~120 DVD's are in VOB format. These are 4:3 video (not HD). I did test this flow and didn't notice a few of the VOB's did not have the audio tracking properly.
When importing them into Premiere Elements 8.01 some of the VOB files have their audio out of synch with the video, yet, they play okay in the Premiere preview window.
Is there a setting so that when it 'conforms', that it will track the audio correctly?
Do I need to buy a conversion tool to go from VOB to mpeg-2 (or other format?) and then import to Premiere Elements 8?
Is there a better video editing tool to use?
I simply want to take all these 8mm tapes / DVD's to splice the best scenes.
I am running Windows 7 Ultimate 64-bit AMD Athlon II X4 630 2.8GHz processor, 4GB of DDR3 memory; and installed an ATI HD-4350 pcie gen2 graphics card. I have a memorex bluray dvd player.
Thanks, SJK.

I have NOT used those products, I only forward due to other mentions
Convert http://premierepro.wikia.com/wiki/FAQ:How_do_I_convert_my_files%3F
Edit Vob http://premierepro.wikia.com/wiki/FAQ:How_do_I_import_VOB_files_/_edit_a_DVD%3F
$99 http://www.corel.com/servlet/Satellite/us/en/Product/1175714228541#tabview=tab0
$99 http://www.womble.com/products/mvw.html
$80 http://www.nchsoftware.com/prism/index.html
$75 http://www.videoredo.com/en/index.htm
$75 http://www.magix.com/us/movie-edit-pro/
$70 http://www.nchsoftware.com/prism/index.html Converter
$40 http://www.daniusoft.com/dvd-ripper.html#135
$40 http://www.deskshare.com/dmc.aspx Digital Media Converter
$00 http://www.squared5.com/ Converter
$00 http://www.erightsoft.com/SUPER.html Converter
$00 http://www.virtualdub.org/ Converter

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If you are using a windows 64 bit computer download avconv here: http://win32.libav.org/win64/
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Click on the Windows key on your keyboard. Type in Run and then press enter. Type in CMD and press enter. This will open up windows command line. Don't worry, it's not as scary as you think.
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#2. Did you copy the exact path (location on your computer) where you have your video file?
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Here are the details of the problematic video file that I had this issue with. This is from avconv:
Metadata:
    major_brand     : mp42
    minor_version   : 1
    compatible_brands: mp42mp41
    creation_time   : 2013-05-12 11:45:32
Duration: 01:58:28.24, start: 0.000000, bitrate: 3256 kb/s
    Stream #0.0(eng): Video: h264 (Constrained Baseline), yuv420p, 1280x720, 2997 kb/s, 25 fps, 25 tbr, 25 tbn
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      creation_time   : 2013-05-12 11:45:32
    Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, fltp, 256 kb/s
    Metadata:
      creation_time   : 2013-05-12 11:45:32
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