Server 2008 RRAS Internal adaptor causing duplicate DNS entry for host

I have Server 2008 configured with AD, DNS, DHCP and Routing and Remote Access.  The Server is set-up with a static IP address 192.168.127.2 and the DHCP allocates addresses in the range 192.168.127.100/199 to clients.  The RRAS is automatically configured with three adaptors "Loopback" (127.0.0.1), "Local Area Connection" (192.168.127.2) and "Internal" (192.168.127.112 allocated by DHCP).

The problem is that there are two entries created in DNS for the host, MYSERVER 192.168.127.2 and MYSERVER 192.168.127.112.  This cause a problem with the client computers when they do a DNS lookup in that the MYSERVER ip address is sometimes returned as 192.168.127.112 at logon causing network shares assignment in the logon script to fail (among others).  If the DNS entry is deleted manually everything functions again for a while until the DNS entry is mysteriously created again.

Can anyone help???