maxResult is not working when doing a tasks.tasklists.list

Question

First of all the documentation is wrong. It says that the default value for MaxResult is 100, but if I do a query ( on my account with 31 lists) on the Tasks API explorer without setting the MaxResult parameter, I always get 20 items back with a nextPageToken to be able to query the next 20 items.

If I set the maxResults to 1, 10 or 100 nothing changes, I still get always 20 items.

Any help is appreciated.Thanks

UPDATE : This is how my query is made:

...
GTLQueryTasks* query = [self createQueryForCmd:cmd];
self.tasksTicket = [self.tasksService executeQuery:query  completionHandler:^(GTLServiceTicket *ticket, id object, NSError *error) {
...// handle the response
 }
... 

// This helper method creates a query for each type of operation,I have omitted operations other than lists.list

-(GTLQueryTasks*)createQueryForCmd:(SyncCommand*) cmd{
    NSString* listId = cmd.listId;
    GTLQueryTasks *query = nil;
    GTLObject* localObject = nil;
    NSString* transactionETag = nil;
    switch (cmd.syncOperation) {
            /*------------Lists operations---------------------------------*/
        case SyncOpListsList:{
            query =  [GTLQueryTasks queryForTasklistsList];
            query.maxResults = 100;
            break;
        }
.....
}