Assuming you are IVTCing and these frames are alone, then it might just mean that tdecimate is fucking up the clean frame detection. You can force it to pick the good frames and/or discard the bad ones by way of ovr files.
ovr files are made like so
the first line tells tdecimate to keep the 123rd frame, the second tells it to drop the 213th frame, the third tells it to keep frame 312, drop 313, then keep 314, 315, and 316, then repeat the same keep/drop pattern for the other frames as indicated (aka dropping the second frame in every 5 frames set).
You save this code in a file named like "blabla.ovr" and then in avisynth you have your tdecimate call as
keep them in the same folder of course.
Also, the second image shows some leftover combing, so I'm guessing perhaps you should try to see if you can improve the tfm settings.