Chart-Entities in JFreeChart HEAD/trunk are generated wrongly. All Item-Entities have a shape that uses a coordinate system relative to the chart\'s data-area instead of the chart\'s complete rendering area. Therefore, to get the correct results, you will have to translate these entities with the dataArea\'s X/Y coordinates.
This bug may be related to #3027233
See Pentaho JIRA case PRD-2917 for more details. ( http://jira.pentaho.com/browse/PRD-2917 )