I can't get LDAP/LDIF multivalued attribute to be correctly handled, even  I set a field's type in the schema to LIST.

For instance if I use tFileInputLdif -> tFileOutputLdif on the following file:
dn: uid=yoel,ou=people,o=org
objectclass: top
objectclass: person
objectclass: organizationalPerson
objectclass: inetOrgPerson
uid: yoel
mail: yoel@org.com
telephoneNumber: +123-4-567-89-2
telephoneNumber: +123-4-567-89-3
telephoneNumber: +123-4-567-89-4
cn: yoel
sn: name

I get:
...
telephoneNumber: [+123-4-567-89-2,+123-4-567-89-3,+123-4-567-89-4]
mail: yoel@org.com
uid: yoel
objectclass: [top,person,organizationalPerson,inetOrgPerson]
sn: name
cn: yoel

What am I doing wrong?

Yoel