need some advise with DNS problems

[Ovidiu]

I changed from an old, broken server to a new one and moved all sites (using ispcfg 3) to the new server.
everythign went smooth except for one domain.
this one domain is a co.za domain, registered via marcaria.com and using their DNS. I only provide the website content.

after this move I asked the owner to change his DNS to point to the new server.

the result is that now his A-records point to the old and the new server, giving you a 50% chance of landing on the right server.

here are two tests:

http://dnssy.com/lookup.php?q=jadeyoga.co.za&t=A shows two IPs for the a-record and

http://dnssy.com/report.php?q=jadeyoga.co.za shows several DNS issues.

I asked the client to chat with the co.za registry but they sent him to me, same goes for marcaria.com whose DNS servers he is using.

since I don't provide anything else than hosting for him, I am not sure how I can fix this and where this problem could originate on my server.

any advice?

[alleks]

There is nothing else you can do, it's his problem.

They did not changed the dns registry, they've only added a new one... do a

dig jadeyoga.co.za

and you will se it your self

[Ovidiu]

Thanks.
I was just trying to make sure I haven't overlooked anything on my end...