Field repeat when deinterlacing

I find a frequent issue using Dione that the last field before the next shot in a sequence will repeat following the first field or frame of the next shot, OR alternatively, the last frame of the first shot will double-expose over the first field of the next shot. NOTE that that this appears not to be an issue of odd/even field order choice, because if I select EVEN instead of ODD, I get every other frame going backwards. The two examples of frame sequence of shots A and B: AAAAAABABBBBBB or AAAAAAA*[A+B]*BBBBBB