problem: differnt Servers resolve different addresses.

Hi,
I have a problem with 4 DNS server displaying 2 different IP addresses for an A 
record.

I'll explain my configuration.

I have 2 DNS servers in a data center, they are the SOA for all web domains.
I have 2 DNS servers on my office LAN, they are the SOA for all local and test 
domains.

I have the domain www.e-netcomm.co.uk which is hosted on my data center servers 
as this is a web domain about to go live.

The dns record looks like this 

$TTL 3h
@       IN      SOA     vader.e-netcomm.co.uk. hostmaster.e-netcomm.co.uk. (
                                        2002180603      ; serial
                                        3h      ; refresh after 3 hours
                                        1h      ; retry after 1 hour
                                        1w      ; Expire after 1 week
                                        1h )    ; negative caching TTL of 1 hr

; Set Name Servers

e-netcomm.co.uk.        IN      NS      vader.e-netcomm.co.uk.
e-netcomm.co.uk.        IN      NS      maul.e-netcomm.co.uk.

; Set MX/Mail Hosts

e-netcomm.co.uk.        IN      MX      0 mail.e-netcomm.co.uk.

; set hosts


www             IN      A       212.113.200.68
mail            IN      A       212.113.200.71
ftp             IN      CNAME   www



As you can see the www record points to the IP address 68 

If I check this from the e-netcomm server, it looks good. It also looks good 
from all random DNS servers I have checked it against.


# dig www.e-netcomm.co.uk

; <<>> DiG 9.2.2 <<>> www.e-netcomm.co.uk
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 49879
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;www.e-netcomm.co.uk.           IN      A

;; ANSWER SECTION:
www.e-netcomm.co.uk.    10800   IN      A       212.113.200.68



Now for the problem.

I go to my office servers, and check out www.e-netcomm.co.uk

[darcym@jordan ~]$ dig www.e-netcomm.co.uk

; <<>> DiG 9.2.2 <<>> www.e-netcomm.co.uk
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28167
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 0

;; QUESTION SECTION:
;www.e-netcomm.co.uk.           IN      A

;; ANSWER SECTION:
www.e-netcomm.co.uk.    9242    IN      A       212.113.200.71



As you can see it resolve to 71

This record is more than 2 months old (ish)

I don't understand why this server has not picked up the new IP addresse (68)

when a.) the record should expire after 1 week (assuming the server was down) 
b.) the refresh time for this record was 3 hours ? so as I understand it this 
record should start to propogate down the DNS chain after 3 hours.

Can one have any suggestiosn / need specific information ???

Thanks,

Matt.