KML Google地图-仅显示一个地标，而不显示多个
KML Google Maps - Only one placemark showing rather than multiple

我的以下Google地图位于：

http://www.ticketrich.com/uk-days-out-guide/

我正在使用WP插件，该插件使用短代码通过[map kml = http：//www.ticketrich.com/map5.kml]初始化地图。

这是kml文件的内容：

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.google.com/earth/kml/2">
<Document>
<Folder>
<name>Folder.kml</name>
<open>1</open>
<description>
A folder is a container that can hold multiple other objects
</description>

<Placemark>
<name>Alton Towers</name>
<description>Alton Towers Information</description>
<Point>
  <coordinates>-1.891,52.9898,0</coordinates>
</Point>
</Placemark>
<Placemark>
<name>Chessington World of Adventures</name>
<description>Chessington World of Adventures Information</description>
<Point>
  <coordinates>-0.31539,51.35013</coordinates>
</Point>
</Placemark>
<Placemark>
<name>Banqueting House</name>
<description>Banqueting House</description>
<Point>
  <coordinates>-1.0968,53.8937</coordinates>
</Point>
</Placemark>
</Folder>
</Document> 
</kml>

问题在于，它仅显示地标之一。 无论我尝试了什么，我都无法使它们全部正常工作。 谁能看到问题所在？