iiNet DNS problems

gistfile1.txt

$ dig PTR 169.41.170.124.in-addr.arpa.

; <<>> DiG 9.7.3-P3 <<>> PTR 169.41.170.124.in-addr.arpa.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43719
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;169.41.170.124.in-addr.arpa.	IN	PTR

;; ANSWER SECTION:
169.41.170.124.in-addr.arpa. 86316 IN	PTR	124-170-41-169.dyn.iinet.net.au.

;; Query time: 51 msec
;; SERVER: 10.112.121.76#53(10.112.121.76)
;; WHEN: Mon Dec 19 09:22:48 2011
;; MSG SIZE  rcvd: 90



$ dig A 124-170-41-169.dyn.iinet.net.au.

; <<>> DiG 9.7.3-P3 <<>> A 124-170-41-169.dyn.iinet.net.au.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 55424
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;124-170-41-169.dyn.iinet.net.au. IN	A

;; AUTHORITY SECTION:
dyn.iinet.net.au.	818	IN	SOA	ns1.iinet.net.au. hostmaster.iinet.net.au. 2011092007 10800 3600 3600000 86400

;; Query time: 53 msec
;; SERVER: 10.112.121.76#53(10.112.121.76)
;; WHEN: Mon Dec 19 09:22:49 2011
;; MSG SIZE  rcvd: 100