1280x545 is a 1:1 pixel aspect ratio for a 2.35:1 image, because ideally when doing 2d sharpening or smoothing you want a 1:1 pixel aspect ratio image, and also the MSU Denoiser crashes on images wider than 1280 pixels.

As for dealing with cleaning up & scaling truly interlaced source (not merely the interlacing of 3:2 pulldown) I have another method I'm working on using AviSynth, but that's another story.

BTW, I messaged you about Leia's 7 seconds welding clip, did you get it? the default users setting might be not to receive messages.