The work-around by @axemanuk666 above to split Continue Watching and On Deck is likely only going to work for another couple of weeks, because I believe it requires the home page to be manually managed. It was mentioned earlier in this thread (and others) that that option will soon be gone.
Whether or not that date and decision is permanently etched in stone might be debatable, time will tell.
The last bullet point from Universal Continue Watching (Experimental Feature) before the thread was closed says
Keeping On Deck Separate from Continue Watching
We’re still looking into how the underlying desire here might be best addressed, but we don’t have anything specific to share right now.
When it was still an experimental feature, it seemed to be a “User” option, as it was enabled/disabled from the users account page. That is, it wasn’t a server option that the admin controlled for all users.
I realize that the code around all of this has progressed and changed over time, in the server and in the apps, but if it was a user option just two months ago, one would think it should still be possible. It seemed to work well as an experimental option, so I can’t see why it wouldn’t work without the “Experimental” label.