Thanks for the suggestions, and apologies for the wrong date.
It should have been Sept 12.
a) domain registrar is now DH, transfer confirmed on 17 Sept.
Nameservers were changed at previous registrar before requesting
b) whois shows
Domain servers in listed order:
c) neither F5 nor shift+refresh on browser makes any difference.
In any case traceroute is resolving to 188.8.131.52 (Sgp) when
user's other domains resolve to 184.108.40.206 (DH)
Not sure if I am allowed to post links but site is http://www.mako1.com/
(nothing fancy, we just use the domain for emails).
The DH page has the initials 'DH' below the shark while the old server
page does not have those initials.
What I can't understand is why the Sgp people have been able to get
the DH page as early as 14 Sept (and all emails have been going to
DH server) when I am still getting the old page now.