Make your project settings accordently to the footage.
You can do this via Desktop and set the fields to NON.
Or convert the file to a dv-avi.
Or download the MPEG plugin for Premiere from Mainconcept, this will edit the file flawless but you will be probably stuck with a watermark.
seems to have been captured from an older dv camera.
Your client has given you an end product - MPEG video. Rather than try and use a finished product as source media, your best bet is to get the original DV files to work with.
I agree with both Ann and Jim.
The best solution would be for the client to go back a level in the process, and get you the DV-AVI Type II file, that was Captured from the miniDV tape - not a processed MPEG. Note: file size will be larger still, but if he/she uses a site like YouSendIt, you can basically download the file. It's like FTP, but without having to possess your own server. Works perfectly. There are also many similar services that get around the large file sizes.
Next, as Ann says, "convert to DV-AVI Type II." However, this means that the quality will already have suffered with the initial MPEG-2 compression. Super, or any other program, will not be able to put that quality back in. It is gone forever. Also, if you are going to output to DVD, or some other compressed format, you WILL induce another quality loss. The conversion to DV-AVI Type II is only so that PrPro can edit the footage most effectively. I would guess that your issues stem from using MPEG-2 files.
I do not use Super, but it does get good recs on many boards. I was under the impression (seems mistaken) that it was limited to output PAL footage. It seems that I am totaly incorrect in that thinking, as you are outputting NTSC 4:3, right?