There's no urgency for me - I'm just testing.
I at first assumed that I'd have to repeat the double process for each task (Hot Potato exercise). I realise now, that having chosen the navigation and other settings for the first exercise via Settings > Edit task > Up date, each new exercise (or set of exercises) will automatically have those settings until I choose something different. That seems quite efficient. I don't usually change settings for the individual exercises in a given chain, and I don't suppose others do either.