<font face="Arial, Verdana">What we do is writing </font>/home/eike/.local/share/RepetierHost/composition0.stl positioned where it should be sliced. -s posx=0 -s posy=0 tells the engine not to shift around the stl file.
Looking at the log I think
16:26:15.796 : <CuraEngine> Config(/home/eike/.local/share/RepetierHost/cura.ini):L13: Failed to set 'skinSpeed' to '45'<br style="box-sizing: border-box; color: rgb(51, 51, 51); font-family: 'Open Sans', Arial, serif; font-size: 16px; line-height: 22.8571px; background-color: rgb(255, 255, 255);">16:26:15.796 : <CuraEngine> Failed to read config '/home/eike/.local/share/RepetierHost/cura.ini'
is the real problem. So you better look into the ini file and check what might disturb cura here. If the ini file is ignored no body can say what values it takes. For a working version it looks around skinSpeed like this
<font color="#333333" face="Open Sans, Arial, serif"><div>infillSpeed = 43
skinSpeed = 36
inset0Speed = 33
insetXSpeed = 33
</font></span></div>