Page Breaks prevent the whole article [except when "all pages" is selected] being parsed at one time, which Google Maps deprecates and thus does NOT issue an approval for the seond and subsequent map, so those maps are not displayed - just the outline of the div holding the map.

This is explained in more detail in the code section [Google Map - Code ] under "Control Structure within Plugin" under "Help on writing the plugin".

The solution is either to use Tabs and Accordions from Regular Labs to separate the maps, OR to use a "Blog Layout".