[Therion] wrong representation in google earth

[Boldt, Markus]

Hi, 
I have a cave with a tree of 11 survey-files. There are 15 scraps in my survey. It works all well if I produce a Map in PDF-Format. But the kml-File makes a mistake. I see only some parts of the cave. First 3 parts are seen, fourth part isn`t seen, then only parts of the fifth and sixth are seen, the whole 7 part and so on. The first point (entrance) is fixed with UTM-Coordinates. What could be the reason? What is wrong? 
regards 
Markus