How is #nostrudel using relays?

I can see my curated relays in 'contact list relays' (curated through Amethyst), but then it says "hey, nostrudel doesn't use this list"... so I go to look at 'app relays' and there's a frozen list of legacy relays from when I first logged in a couple of months back.

Did #amethyst broadcast my updates? If so, then why can't #nostrudel read that update and work with it, rather than telling me I must use the list that was present when I first logged on - no more, no less?

Hmmm