appcenter/apps/ucsschool/version: 4.1 R2 v4

First created two schools in UMC.

root@dc:~# python
Python 2.7.3 (default, Aug 29 2016, 16:34:01) 
[GCC 4.7.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from ucsschool.lib.models import Student
>>> from univention.admin import uldap
>>> connection, position = uldap.getAdminConnection()
>>> student1 = Student(school="Schule1", schools=["Schule1", "Schule2"], name="student1", lastname="Student1lastname", firstname="Student1firstname")
>>> student1.create(lo=connection)
True
>>> udm_student1 = student1.get_udm_object(lo=connection)
>>> print udm_student1['groups']
['cn=schueler-schule1,cn=groups,ou=Schule1,dc=prog,dc=int', 'cn=Domain Users Schule1,cn=groups,ou=Schule1,dc=prog,dc=int']

<- Not OK

I would expect that student1 is also member of "schueler-schule2" and "Domain Users Schule2".