Those dimensions seem to be correct. PAR = DAR/SAR. PAR is the Pixel Aspect Ratio, DAR is the Display Aspect Ratio, and SAR is the Storage Aspect Ratio. 1920/1080 = 1.778. If what I read is correct .m2t files are HDV and would be 1440 x 1080 (1.333) and not full HD files (1920x1080, 1.778). I'm not sure about the .avi and .wmv. Have you tried exporting the video as H.264 or another format?
On video studio pro the H.264 is with a whole bunch of other formats like .m2p .m2v eetc under the mpeg files. I cannot individually select those formats. And in the settings max resolution is 720 x 576.