Possible bug when using 'Icon options - Content type' field

When I want to show my different markers for my different content types on a map, the map displays OK with the different markers on it.

BUT:

Above the map I get this text, that I cannot seem to get rid of (there is one of these for every marker):

stdClass Object ( [nid] => 65 [node_title] => Frankrig [node_data_field_gmaps_p_vid] => 65 [node_data_field_gmaps_p_map_type] => earth [node_data_field_gmaps_p_latitude] => 46.227638 [node_data_field_gmaps_p_longitude] => 2.213749 [node_data_field_gmaps_p_elevation] => 0.00 [node_data_field_gmaps_p_x] => 4.41678e+06 [node_data_field_gmaps_p_y] => 170737 [node_data_field_gmaps_p_z] => 4.58279e+06 [node_data_field_gmaps_p_privacy] => [node_data_field_gmaps_p_bounds] => a:2:{s:9:"northeast";O:8:"stdClass":4:{s:8:"latitude";s:9:"50.038002";s:9:"longitude";s:8:"10.40955";s:9:"elevation";s:1:"0";s:8:"map_type";s:5:"earth";}s:9:"southwest";O:8:"stdClass":4:{s:8:"latitude";s:9:"42.133164";s:9:"longitude";s:9:"-5.982052";s:9:"elevation";s:1:"0";s:8:"map_type";s:5:"earth";}} [node_data_field_gmaps_p_pov] => [node_data_field_gmaps_p_search] => France [node_vid] => 65 [node_uid] => 1 [node_type] => destination )

And this (also one for each piece of content):

set overlay options

Is there a way to get rid of this?

See also attached image.