|Quote from Canon's site:|
"In 60i mode, you have the standard NTSC interlaced video field rate. 30F and 24F offer full frame rates for additional clarity and a film-like look. These Frame modes have the same look as progressive frame rates, but are not labeled "progressive" because they are created with an interlaced chip. The end result is exactly the same to the editing system (and to our eyes) as 30p and 24p, respectively."
In other words, in 30p & 24p modes, there is no temporal displacement in each frame, ie there's no fielding. If that's the case, you'll want to use a progressive preset (1080p) for any rendering.