Postgres query should return an array of an array instead of an array of string

strong textI have the following problem: Given the two tables contacts and organisations :

WITH contacts(oe_id, name, email, person_id) AS (VALUES
    (1, 'Mark', '[email protected]', 19650728),
    (2, 'Tom', '[email protected]', 20010627), 
    (1, 'Frank', '[email protected]', 20040709), 
    (3, 'Petra', '[email protected]', 19700317), 
    (3, 'Paul', '[email protected]', 19681006)),
organisations(oe_id, name) AS (VALUES
    (1, 'Cardiology'), 
    (2, 'Neurology'), 
    (3, 'Dermatology'), 
    (4, 'Churgery'))

I want to get a table with 3 columns: the organisation name, the organisation id, and an array of contactpersons for that organisation. Every array element is also an array with the data of the contact person.

First I created a table in which all contact columns are being aggregated into an array. One array per tuple row:

 WITH contacts(oe_id, name, email, person_id) AS (VALUES
    (1, 'Mark', '[email protected]', 19650728), 
    (2, 'Tom', '[email protected]', 20010627), 
    (1, 'Frank', '[email protected]', 20040709), 
    (3, 'Petra', '[email protected]', 19700317), 
    (3, 'Paul', '[email protected]', 19681006)),
organisations(oe_id, name) AS (VALUES
    (1, 'Cardiology'), 
    (2, 'Neurology'), 
    (3, 'Dermatology'), 
    (4, 'Churgery')),
contacts_aggregated(oe_id, cdata) AS (
    select oe_id, ARRAY[name, email, person_id::text] from contacts) 
select * from contacts_aggregated;

This result into:

 oe_id |                 cdata
-------+---------------------------------------
     1 | {Mark,[email protected],19650728}
     2 | {Tom,[email protected],20010627}
     1 | {Frank,[email protected],20040709}
     3 | {Petra,[email protected],19700317}
     3 | {Paul,[email protected],19681006}
(5 rows)

Next step is to aggregate cdata (contact data) for each organisation id:

WITH contacts(oe_id, name, email, person_id) AS (VALUES
    (1, 'Mark', '[email protected]', 19650728), 
    (2, 'Tom', '[email protected]', 20010627), 
    (1, 'Frank', '[email protected]', 20040709), 
    (3, 'Petra', '[email protected]', 19700317), 
    (3, 'Paul', '[email protected]', 19681006)),
organisations(oe_id, name) AS (VALUES
    (1, 'Cardiology'), 
    (2, 'Neurology'), 
    (3, 'Dermatology'), 
    (4, 'Churgery')),
contacts_aggregated(oe_id, cdata) AS (
    select oe_id, ARRAY[name, email, person_id::text] from contacts),
contacts_for_organisations(oe_id, contacts) AS (
    SELECT organisations.oe_id, array_agg(contacts_aggregated.cdata::text) 
    FROM organisations
    JOIN contacts_aggregated USING(oe_id) 
    GROUP BY oe_id)
SELECT * FROM contacts_for_organisations;

This results into the following:

 oe_id |                                      contacts
-------+------------------------------------------------------------------------------------
     1 | {"{Mark,[email protected],19650728}","{Frank,[email protected],20040709}"}
     2 | {"{Tom,[email protected],20010627}"}
     3 | {"{Petra,[email protected],19700317}","{Paul,[email protected],19681006}"}
(3 rows)

As you can see the result is an array. But its elements should also be an array. Instead of an array I get an imploded array as a string.

Wat I want is something like this:

 oe_id |                                      contacts
-------+------------------------------------------------------------------------------------
     1 | {{Mark,[email protected],19650728},{Frank,[email protected],20040709}}
     2 | {{Tom,[email protected],20010627}}
     3 | {{Petra,[email protected],19700317},{Paul,[email protected],19681006}}
(3 rows)

If I remove the cast to text array_agg(contacts_aggregated.cdata::text I get:

could not find array type for data type text[]

What am I forgetting/doing wrong? Postgres: psql (9.2.24) and psql (9.6.10, server 9.2.24)

If I run the code using a postgres client 9.6 on a postgres 9.6 server everyting works fine.