Order successfull when a pre/postprocessing script is used

An order always is handled as successfull execution when a pre/postprocessing script is used. Even, when the script is empty or just returns true. The configuration below reproduces the error.
This error only occurres when using API-Jobs with pre/postprocessing.

<?xml version="1.0" encoding="ISO-8859-1"?>

<job order="yes"
stop_on_error="no"
name="x">
<description>
<include file="jobs/JobSchedulerSSHJob.xml"/>
</description>
<script language="javascript"
java_class_path="">
<![CDATA[
function spooler_process(){

return false;
}
]]>
</script>
<monitor name="process0"
ordering="0">
<script language="javascript">
<![CDATA[
function spooler_process_before(){
return true;
}
]]>
</script>
</monitor>
<run_time/>
</job>

<?xml version="1.0" encoding="ISO-8859-1"?>

<job title="Launch commands or executable files by SSH"
order="yes"
stop_on_error="no"
name="y">
<description>
<include file="jobs/SOSSSHJob2JSAdapter.xml"/>
</description>
<params/>
<script language="shell"
java_class_path="">
<![CDATA[
echo y
]]>
</script>
<run_time/>
</job>

<?xml version="1.0" encoding="ISO-8859-1"?>

<config>
<jobs>
<job order="yes"
stop_on_error="no"
name="x">
<description>
<include file="jobs/JobSchedulerSSHJob.xml"/>
</description>

<script language="javascript"
java_class_path="">
<![CDATA[
function spooler_process(){

return false;
}
]]>
</script>

<monitor name="process0"
ordering="0">
<script language="javascript">
<![CDATA[
function spooler_process_before(){
return true;
}
]]>
</script>
</monitor>

<run_time/>
</job>

<job title="Launch commands or executable files by SSH"
order="yes"
stop_on_error="no"
name="y">
<description>
<include file="jobs/SOSSSHJob2JSAdapter.xml"/>
</description>

<params/>

<script language="shell"
java_class_path="">
<![CDATA[
echo y
]]>
</script>

<run_time/>
</job>
</jobs>
<job_chains>
<job_chain orders_recoverable="yes"
visible="yes"
name="job_chain1">
<job_chain_node state="1"
job="x"
next_state="2"
error_state="error"/>

<job_chain_node state="2"
job="y"
next_state="success"
error_state="error"/>

<job_chain_node state="success"/>

<job_chain_node state="error"/>
</job_chain>
</job_chains>
</config>