It looks like what you are experiencing is due to a bug in WebSphere: PM47459
Installing the latest fixpack will probably resolve the issue.
Question
Is it possible to bind (EJB 3.1) MDBs using ListenerPort (instead of activation specification) in websphere application server 8.0?
Solution
It looks like what you are experiencing is due to a bug in WebSphere: PM47459
Installing the latest fixpack will probably resolve the issue.