[HELP] bypass/disable deinterlace

[Barrythecrab]

First I wish to thank you, Selur, for taking my question and running with it.
Using the recent 12.20.1. scan stated BFF, that cannot be correct, I suspect lack of flag on the AVI.
So, I take my captured HuffYUV file and in the HuffYUV window I have chosen 4:2:2 and interlacing ticked to TFF, for export.
In the filter window Avisynth the auto deinterlace is ticked to QTGMC and the overwright is unticked.
A few added filters for testing.
The file is created but in MediaInfo it states "scan type progressive" "Original scan type interlaced".
Display aspect ratio                    : 3:2
Frame rate                              : 29.970 (30000/1001) FPS
Standard                                : NTSC
Color space                              : YUV
Chroma subsampling                      : 4:2:2
Bit depth                                : 8 bits
Scan type                                : Progressive
Original scan type                      : Interlaced
Good grief it will NOT accept my TXT debug file, says it's too big at 449kb. If I post it as text you'll all kill me! Maybe I will DM/PM Selur to avoid death, or is that worse???
I am confused, not an entirely foreign condition for me. Would you need a short before and after sample? I do not think it is a bug, but I want to be sure and learn along the way.
Thank you again.
Barry