Autocomplete tags style

In devel tab it looks like this.

field_users (Array, 1 element)
und (Array, 2 elements)
0 (Array, 1 element)
target_id (String, 1 characters ) 2
1 (Array, 1 element)
target_id (String, 1 characters ) 3

A node test submit in $form_state in hook_form_submit it looks like this

values (Array, 29 elements)
nid (NULL)
.. and some more basic values in values array ....
field_users (Array, 1 element)
und (Array, 3 elements)
0 (Array, 1 element)
target_id (String, 1 characters ) 2
1 (Array, 1 element)
target_id (String, 1 characters ) 3
2 (Array, 1 element)
target_id (String, 2 characters ) 13

We have tried everything and this is the only field/widget we have never got to work.

I get no errors at all just no users added to the field
one of the examples i have tried

{
  "title":"Test",
  "type":"testtype",
  "field_users":[{
    "und":[
      {
        "target_id": "2"
      }
    ]
  }]
}
An other
{
  "title":"Test",
  "type":"testtype",
  "field_users":[{
    "und":[
      {
        "target_id": "[uid:2]"
      }
    ]
  }]
}
 a third
{
  "title":"Test",
  "type":"testtype",
  "field_users":[{
    "und":[
      {
        "target_id": { "target_id": "2"}

      }
    ]
  }]
}

So the nodes are created with title and the right contenttype but no users are added.

Have tried this one also:

{
  "title":"Test",
  "type":"testtype",
  "field_users":[{
    "und":[
      {
        "target_id": "User (2)"
      }
    ]
  }]
}

That is not helping at all. Please dont tell me what dosn't work. If you know how to submit the autcomplete please provide it instead. As you can see i have added the form submit output and nothing works for me so far following all the standard way. Please provide the correct FAPI structure if you know it.

Unfortunately I do think autocomplete with multiple options is a bug right now and is not working.

Please don't mark anything as fixed when you have not help anything to fix the problem.

marcingy i really don't understand why you are posting here as you don't want to read the earlier posts and don't want to help. If i have misunderstood your intentions I apologize. Of course I have read the documentation, i have got mostly every singe field working with services except multiple tag style autocomplete fields. As some fields are really hard to guess how it works even with dpm i come here for help. Someone not reading earlier posts and write RTFM does not help.

I have added the dpm posts (and $form_state) for the field, it was the first thing i added see post #2 and #3. but i can added here again... As a lot of the reference fields is not just look at the dpm output to understand as I am still asking. If it was easy to read from just the dpm and wasn't important i wouldn't ask.

field_users (Array, 1 element)
und (Array, 2 elements)
0 (Array, 1 element)
target_id (String, 1 characters ) 2
1 (Array, 1 element)
target_id (String, 1 characters ) 3

from the code above i see it should be but it isn't:

{
  "title":"Test",
  "type":"testtype",
  "field_users":{
    "und":[
      {
        "target_id": "2" //or "user (2)"
      },
      {
        "target_id": "3" //or "user (3)"
      }
    ]
  }
}