A nested NSDictionary with a value of ForKeyPath returns brackets instead of an NSString

Source - JSON in CouchDB (relevant data):

{
"_id":"f994892f3fb525d73b3b6b8a59000e1d",
"_rev":"3-c431ee9334e9be038d9c935efcf2f049",
"teiXML":[
  {
     "teiHeader":[
        {
           "fileDesc":[
              {
                 "publicationStmt":[
                    {
                       "publisher":"University",
                       "pubPlace":"Someplace",
                       "idno type=\"callNo\"":"ABC 007",
                       "date":"2007"
                    }
                 ],

This is NSDictionary (simplified):

<CCouchDBDocument: 0x5842c0> (id:f994892f3fb525d73b3b6b8a59000e1d rev:4-3fc1a36de622529cd67416c9e5ae88da {
"_id" = f994892f3fb525d73b3b6b8a59000e1d;
"_rev" = "4-3fc1a36de622529cd67416c9e5ae88da";
teiXML =     (
            {
        teiHeader =             (
                            {
                fileDesc =                     (
                                            {
                        publicationStmt =                             (
                                                            {
                                date = 2007;
                                "idno type=\"callNo\"" = "ABC 007";
                                publisher = "University";

I would like to get the value "publisher", so I tried using valueForKeyPath:

NSLog(@"%@",[doc valueForKeyPath:@"content.teiXML.teiHeader.fileDesc.publicationStmt.publisher"]);

But instead of the value "University" I get this as a conclusion:

1> 2011-05-26 10:10:02.717 MyApp[12770:707] (
        (
                (
                        (
                "University"
            )
        )
    )
)

This is pretty annoying. I can get the value using a combination of indexAtObject:

NSLog(@"%@",[[[[[doc valueForKeyPath:@"content.teiXML.teiHeader.fileDesc.publicationStmt.publisher"] objectAtIndex:0] objectAtIndex:0] objectAtIndex:0] objectAtIndex:0]);

Is something supposed to be wrong? There are more values ​​to retrieve, and I don't want to count how many objectAtIndex repetition objects I need for them to work.