I think you have a field order problem.
Basically fields in an interlaced stream are easy to understand (field 1 is the first field to be recorded/displayed, field 2 is the second one to be recorded/displayed, calling them top/bottom, odd/even, whatever is just bullshit jargon, you can find the proper description of fields on here
http://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.709-5-200204-I!!PDF-E.p... ), BUT there is an issue with the way that different codecs encode the data and if you're not careful you can end up having the fields displayed in the wrong order, i.e., field 2 before field 1, which has the visual effect of jagged edges and shimmery motion.
Most codecs need to be encoded as top field dominant (don't get hung up on the jargon, just go with it for now) but the DV codecs are bottom field dominant so to get the field order right on playback you have to switch the field dominance to bottom on the export settings when you make your DV50 files.
Hope that helps.
