Jerky Conversion xvid to dvd

[swerve2]

I've been trying to get a good dvd from xvid and this seamed ok at first. Now I have discoverd my movies I created are quite jerky, most noticeable when credits are rolling from bottom 2 top and panning the cam from left 2 right.. Also smearing credits.. I am using tmpgnc..

The movie I am trying to make better for example is :

Xvid
Ntsc
Fps=23.976
mpeg lyer 1 sound, but sound isn't prob..
Res 16:9

I'm using tmpgenc to convert and thats where my problem lies.. My setting for tmpgenc are as follows: (with this Movie)

Stream: mpeg2
Size: 720 480
Aspect ratio 4:3
Frame rate: 23.976 (internaly 29.97)
Rate control mode: constant bitrate (cbr)
Bitrate: the calculated bitrate using bit calc..
Buffer size:224
Profile:standard
Video Format:ntsc
Encode mode:3:2pulldown when playback
yuv format:standard
Dc compression:9 bits
motion search precsion:motion estimate search fast

Advanced
Video source type: non interlaced
Feild order b
Soure aspect: 1:1 (vga)
full screen keep aspect ratio..

With all that what can be done to correct this problem.. Anything noticably wrong??