Wrong field on the first line of output video

[Esikhoob]

Hello Friends
I convert a DV-AVI(PAL-Interlaced) to DVD using "DV to DVD guide" of this forum & my MPEG2-encoder was CCE SP .
But the output video(.mpv) has static video jumps up and down slightly .
I think it is because the software put even fields on the first line of output video where it is the place of odd fields or vice-versa(I understand it from "Gunnar Thalin deinterlace smooth"filter for VirtualDub. I use it for convert DV-AVI to XVID as www.100fps.com told , it has an option with this concept that when I select it, similar problem will gone) .
now I have deleted the source file and I wanna correct this MPEG-2 video file and convert it to XVID ,after frameserver this video to VirtualDub with this script(I use DGIndex to convert my bad .mpv file, to .d2v):

LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\DGDecode.dll")

mpeg2source("d:\tavalood.d2v")
separatefields()

I check and uncheck "Gunnar Thalin deinterlace smooth" alternate field order option but in one situation it give even worse quality, may be because of the MPEG-2 compression .
is what I said correct and what is the solution?

[Esikhoob]

I just solve it
the .avs file is like previous post, but I apply these filters to VirtualDub:
field bob(up/down)
deinterlace-smooth v1.1
fieldshift (even frames)
resize(720*576)


the second & third filters are from Gunnar Thalin that must be downloaded,the result is 50Fps movie with no jumping.