Thank you guys for the info on all the video formats. I took the advice to change the zero all around and moved the anamorphic to strict and it worked.
glad it worked. here is a couple things about hb that should be said regarding auto cropping and anamorphic ...
Auto cropping is determined by HB by the number of preview sample frames it gets. The default is 10. its ten samples over the entire course of the movie. Thats why I recommended using 30 as it gives hb more samples to decide on but takes a bit longer on scan.
The samples are taken at % spots based on the source. so at 10 samples they are 10% increments. now that said ... hb will use the largest visible frame size or least amount of cropping it detects. So it errors on the side of showing the black bars if you will since that is the least destructive. This works quite well for almost all sources.
You stumbled on a corner case.
Loose anamorphic on hb assumes a modulus of 16 by default unless told different in its picture settings. This is because especially back in the day many players would not playback anything that was not rounded to 16 pixels (PS3 most notably).
Strict anamorphic does not round anything ... as the name implies it uses the sources strict anamorphic settings in the resulting output file. Therefore results in a perfect mirror of the source. Current apple devices and playback software have no issues with strict anamorphic.
I am glad you solved it and though hb's autocrop feature is about as good as any software offers ... it is not infallible. Like I said ... you found the corner case.
Just wanted to explain the behind the scenes take on what you experienced. Glad it worked out.
Just my .02