Binding dual boot machine?

Have two separate boot partitions. One contains Tiger and the other Leopard. No problem configuring and binding either the AD domain. Both however, are bound to the same computer object. Can I do this?
I’m asking because, when I use the Directory Services Command line Utility to query AD records, it returns “Data source (/Active Directory/mydomain) is not valid”. When I unbind both and re-bind only one, the dscl command returns the AD record.