Currency field not displayed properly inside draw_stats

I have two fields for renting and sale price. Both are defined as Currency field and were shown properly. Recently I noticed that there is some bug with the display of the value of this field.

The prices are shown at 2 placed:
-At top behind the streetname
-Inside the list with all properties

At top the price is shown properly with this code:
<?php echo $property['koopprijs'] . ",-"; ?>

Below I am showing a list with all properties with this code:
<?php @draw_stats("display=list&make_link=true"); ?>

So a sale price of 259000 is shown like this:
€ €259. €0

Live example:
http://casahaarlem.nl/woningaanbod/generaal-joubertstraat-69-3k-tussenwoning/

https://wordpress.org/plugins/wp-property/