schorman13 said:

So you're saying the first one is an extra frame, but the second is a duplicate frame that replaces another?

Instead of this frame:

we get this:

Top: NTSC Bottom: PAL

It looks like the PAL is a duplicate of the previous frame, on the NTSC you don't see the visible splice (glue mark) seen on the LD, hence my conclusion, but I may still be wrong about this one, you'll probably need to check the LD's to be sure. There's so little movement in the picture at this point, so a duplicated frame is perfectly acceptable as a quick fix for NTSC owners. In motion you'll never notice it but the interlacing error is noticable.

Instead of this frame:

we get this:

Top: NTSC Bottom: PAL

The PAL is just a duplicate of the previous frame. If you want to do a quick fix, just delete this frame and duplicate the next frame instead.