Automatic Hardware Setup

[#1]

Does this run more than once?
Reason I ask is I normally use OpenDNS to maintain my own granular whitelist/blacklist setup. I had entered the DNS settings via Putty, and tonight I got a pop-up from the OpenDNS updater saying I was no longer using their nameservers.
I've re-added the DNS settings and disabled AHS.
This is not a huge issue incidentally, I'm just naturally nosey. I assumed that once the router was set up that would be that, as it were. Or perhaps my speed profile being altered today triggered it?

[#2]

Can't really say, I dislike Auto-setup as I prefer to be in control.
I'd certainly expect auto-setup to kick in in the event of, say, a router reset but unsure otherwise.
You can (try to) switch it off here: https://portal.plus.net/automatic_hardware_setup/index.php
I say 'try to' because I can't switch mine off despite (or possibly because) I don't use a Plusnet router.