tries to start Scheduler multiple times on install

It might be that the package gets confused because some apache modules it needs are already there, and I think it somehow starts the scheduler with one of these apache restarts. The only thing that helps is "/usr/share/otrs/bin/otrs.Scheduler.pl -a stop -f"; after that it can be installed. But since I'm doing the installation automatically, it's a major nuisance...

And yes, this is the first install (however, with /etc/dbconfig-common/otrs2.conf already containing correct data).

Setting up otrs2 (3.3.5-1) ...
dbconfig-common: writing config to /etc/dbconfig-common/otrs2.conf
Replacing config file /etc/otrs/database.pm with new version
apache2_invoke perl: already enabled
 * Restarting web server apache2
[Wed Feb 11 14:58:25.653730 2015] [so:warn] [pid 27872:tid 140367113754496] AH01574: module mpm_event_module is already loaded, skipping
   ...done.
apache2_invoke rewrite: already enabled
 * Restarting web server apache2
[Wed Feb 11 14:58:28.627758 2015] [so:warn] [pid 27991:tid 139920270243712] AH01574: module mpm_event_module is already loaded, skipping
   ...done.
apache2_invoke headers: already enabled
 * Restarting web server apache2
[Wed Feb 11 14:58:31.593731 2015] [so:warn] [pid 28110:tid 140603249166208] AH01574: module mpm_event_module is already loaded, skipping
   ...done.
apache2_invoke deflate: already enabled
 * Restarting web server apache2
[Wed Feb 11 14:58:34.587958 2015] [so:warn] [pid 28229:tid 139847740864384] AH01574: module mpm_event_module is already loaded, skipping
   ...done.
Subroutine Load redefined at (eval 22) line 2.
apache2_invoke otrs2.conf: already enabled
 * Reloading web server apache2
 *
Starting OTRS SchedulerERROR: OTRS-otrs.Scheduler-10 Perl: 5.18.2 OS: linux Time: Wed Feb 11 14:58:38 2015

 Message: Scheduler Daemon tries to start but found an already running service!

 Traceback (28405):
   Module: /usr/share/otrs/bin/otrs.Scheduler.pl (unknown version) Line: 260

 ...fail!
invoke-rc.d: initscript otrs2, action "start" failed.
dpkg: error processing package otrs2 (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of otrs:
 otrs depends on otrs2; however:
  Package otrs2 is not configured yet.

dpkg: error processing package otrs (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
Errors were encountered while processing:
 otrs2
 otrs
E: Sub-process /usr/bin/dpkg returned an error code (1)