10.5 server changes host name when changed to be member of 10.4 OD Master

Question

Hi,
I have a Xserve with 10.4.11. This is my working OD master hostname: AAA, FQDN: AAA.domain, realm DOMAIN. Now I have a PowerMac G5, hostname BBB, FQDN BBB.domain, where I install 10.5 server.
When it comes up as stand alone, the hostname is BBB (FQDN BBB.domain), but when I then connect it (as domain member) to my OD master, it promts me to say that "AAA" is a used hostname and that it changes hostname to" AAA (2)".
In my DNS it is still identified as BBB.domain, and it is bind to the realm as BBB.
Why does it act like this?
Subsequently I can't get kerberos to work and SMB does not want to be a member of the domain (always get back to standalone instead of becoming member of the domain).

Answer 1

Here comes a bit more on this one. I waited and maybe this had to do with having a OD master in Tiger and the OD member on Leopard. But now both are in Leopard. And things are the same.
I have thou been studying the Console after some tips. And I'm changing the host name in Server Admin/Network to BBB (what it should be). And it seems to work fine. Name of the server changes where supposed to (what I can see). And in Console I can se that the administration tool changes host name in a variety of places.
And now I wait.
If I do nothing (the network is pretty small), nothing happens. But after a while, I login with for example Remote desktop the followingapears in Console:
+Jan 3 12:58:02 emil mDNSResponder[30]: User updated Computer Name from AAA (2) to AAA+
+Jan 3 12:58:02 emil mDNSResponder[30]: afpovertcp.tcp. service renamed from "AAA (2)" to "AAA"+
+Jan 3 12:58:02 emil mDNSResponder[30]: ssh.tcp. service renamed from "AAA (2)" to "AAA"+
+Jan 3 12:58:02 emil mDNSResponder[30]: sftp-ssh.tcp. service renamed from "AAA (2)" to "AAA"+
+Jan 3 12:58:02 emil mDNSResponder[30]: servermgr.tcp. service renamed from "AAA (2)" to "AAA"+
+Jan 3 12:58:02 emil mDNSResponder[30]: rfb.tcp. service renamed from "AAA (2)" to "AAA"+
+Jan 3 12:58:02 emil mDNSResponder[30]: ldap.tcp. service renamed from "AAA (2)" to "AAA"+
+Jan 3 12:58:02 emil mDNSResponder[30]: net-assistant.udp. service renamed from "AAA (2)" to "AAA"+
+Jan 3 12:58:02 emil mDNSResponder[30]: adisk.tcp. service renamed from "AAA (2)" to "AAA"+
+Jan 3 12:58:02 emil mDNSResponder[30]: User updated Local Hostname from AAA-2 to AAA+
+Jan 3 12:58:03 emil mDNSResponder[30]: Local Hostname AAA.local already in use; will try AAA-2.local instead+
+Jan 3 12:58:03 emil mDNSResponder[30]: afpovertcp.tcp. service renamed from "AAA" to "AAA (2)"+
+Jan 3 12:58:03 emil mDNSResponder[30]: ssh.tcp. service renamed from "AAA" to "AAA (2)"+
+Jan 3 12:58:03 emil mDNSResponder[30]: sftp-ssh.tcp. service renamed from "AAA" to "AAA (2)"+
+Jan 3 12:58:03 emil mDNSResponder[30]: servermgr.tcp. service renamed from "AAA" to "AAA (2)"+
+Jan 3 12:58:03 emil mDNSResponder[30]: rfb.tcp. service renamed from "AAA" to "AAA (2)"+
+Jan 3 12:58:03 emil mDNSResponder[30]: ldap.tcp. service renamed from "AAA" to "AAA (2)"+
+Jan 3 12:58:03 emil mDNSResponder[30]: net-assistant.udp. service renamed from "AAA" to "AAA (2)"+
+Jan 3 12:58:03 emil mDNSResponder[30]: adisk.tcp. service renamed from "AAA" to "AAA (2)"+
+Jan 3 12:58:03 emil mDNSResponder[30]: User updated Computer Name from AAA to AAA (2)+
+Jan 3 12:58:03 emil mDNSResponder[30]: User updated Local Hostname from AAA to AAA-2+
+Jan 3 12:58:03 emil mDNSResponder[30]: mDNS_SetFQDN - hostname unchanged+
"AAA (2) to AAA" may as well be "BBB to AAA". But I'm very surprised over that the logg claims that "User updated Computer name..." For all I know, I haven't. And note in the middle here that the mDNSResponder changes to AAA (which indeed is used - it's the OD master!!!), discovers that the name is in use, and then changes to "AAA (2)".
But why does it at all initiate a change from AAA to "AAA (2)"?
Why can't I call the server BBB?