Yes, I've tried all the combinations listed here. I think this all goes back to an initial issue I had where channels 8.1 & 8.2 swapped in my guide. I have a post about it. Despite what I thought at the time it looks like this is the last vestige of that issue. If Amazon ever allows editing a channel number in the recording options it might solve my issue.
I was having this problem on series on one station. I fixed it by changing default to record all episodes - not just new episodes. I had to restart recast before I figured out how to change that option. (Not sure if that was cockpit error.) Then I had to cancel each series & reset to record series again. I had previously set no preference on HD or SD - as I saw something on that but it alone had not helped.Then show up in scheduled recordings. They were not before.