FeatureCollections can have a collection of features in which the GeometryCollection type provides the coordinates of multiple geometries. The above matter should be fully supported, but in RadMap the geometries in the geometry collection does not render.
When the map is set to e.g. Zoom=1 the world map shows as continued sequence of the same layout. All markers set on the map should appear on all correct places, so that the user could zoom out and pan outside the center view port and still be able to see the markers.