Complete zone not refreshing

I'm having some problems updating a zone of mine. I'd appreciate
another set of eyes.

When I update a zone on the primary nameserver for that zone, and then
run rndc reload, everything seems to reload fine, and there aren't any
errors in syslog about the zone. However, that update isn't always
appearing everywhere. Here is my zone file from the primary nameserver:

$TTL 3D
@ IN SOA roeber.com. postmaster.roeber.com. (
2003070901 ; Serial number
8H ; Refresh
2H ; Retry
4W ; Expire
1H) ; TTL

IN NS ns1.cyberspacematrix.net.
IN NS ns2.cyberspacematrix.net.

roeber.com. IN MX 0 mail.roeber.com.
roeber.com. IN MX 10 odin.cyberspacematrix.net.

roeber.com. IN A 207.106.100.139
webmail IN A 207.106.100.149
mail IN A 207.106.100.150
dorfl IN CNAME roeber.com.


On other servers, if I run nslookup, I see this:

droeber@Glamdring:droeber$ nslookup mail.roeber.com
Server: NOC1.DCCS.UPENN.EDU
Address: 128.91.2.13

Non-authoritative answer:
Name: dorfl.roeber.com
Address: 207.106.100.139
Aliases: mail.roeber.com

droeber@Glamdring:droeber$ nslookup
Default Server: NOC1.DCCS.UPENN.EDU
Address: 128.91.2.13

> set qtype=soa
> roeber.com.
Server: NOC1.DCCS.UPENN.EDU
Address: 128.91.2.13

Non-authoritative answer:
roeber.com
origin = roeber.com
mail addr = postmaster.roeber.com
serial = 2003070901
refresh = 28800 (8H)
retry = 7200 (2H)
expire = 2419200 (4W)
minimum ttl = 3600 (1H)

Authoritative answers can be found from:
roeber.com nameserver = ns1.cyberspacematrix.net
roeber.com nameserver = ns2.cyberspacematrix.net
ns1.cyberspacematrix.net internet address = 207.106.100.40
ns2.cyberspacematrix.net internet address = 12.111.195.141


So I know the updated record is being seen by remote servers, but it
looks like the rest of the updates to the zone file aren't coming
through (mail.roeber.com used to be a CNAME for dorfl.roeber.com, it's
not anymore).

Any ideas?

--
Donald Roeber
ISC Networking