Enterprise Architect States are contained by the State Machine but in UML they must be contained by Regions.
The xmi file generated by Enterprise Architect will create fake regions named EA_regionXX to be UML compliant.
However some of this fake regions will be displayed as extra Regions in MagicDraw diagrams.
This option enable to remove those extra regions not present in State Machine Diagrams.
The option ea2md.semantic.extraRegions in the publisher.properties controls removing of those extra Regions in State Machine.
Set to following option in publisher.properties file:
# If True, extra regions in State Machine Diagrams will be removed. Available values: True, False - default: True
ea2md.semantic.extraRegions=True