Polygons Joined Up

I have an odd problem with placing Gpolygons on a map

I am creating multiple GPolygons by calling a javascript function
repeatedly with the same map object.

Simplistically, we have

loop calling function polygon(map object, array of points)

function polygon(map, array) {

var polygon= new Gpolygon(array...);
map.addOverlay(polygon);
}

I have made sure the polygons are closed with the start and end points
being the same.

The big problem I have is that for some reason the polygons are all
being linked by a line. You can see this at http://www.phased.co.uk/GBBR/viewcycle.php

I am stumped..any ideas?

TIA

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