Sort order in list wrong: in CAML and in view

Question

Hello,
When I order my list with document sets by ID, the order is wrong. It is wrong in the list and with caml.
This is my view (I just set the sort on the ID column):
The first 4 objects are created by the Client Object Model; the last 4 are created by a SharePoint webpart that I developped myself...
My code for creating document sets in COM is something like this:
ListItemCreationInformation newItemInfo = new ListItemCreationInformation
UnderlyingObjectType = FileSystemObjectType.Folder,
LeafName = _strLeafname // = date in format YYYYMMDDhhmmss
ListItem newListItem = myList.AddItem(newItemInfo);
newListItem["ContentTypeId"] = targetDocumentSetContentType.Id.ToString();
newListItem["Title"] = title;
newListItem.Update();
clientContext.Load(myList);
clientContext.ExecuteQuery();
The code in the webpart is this:
SPContentType docsetCt = myLst.ContentTypes[p.GetFromResourcefile("xxxxxxxxxxxxxx")];
Hashtable properties = new Hashtable
{"DocumentSetDescription", ""},
{"Title", txtTitle.Text}
SPFolder parentFolder = myLst.RootFolder;
int newId = GetLastId(myLst) + 1;
DocumentSet ds = DocumentSet.Create(parentFolder, newId.ToString(CultureInfo.InvariantCulture), docsetCt.Id, properties, true);
ds.Item["Title"] = title
ds.Item.Update();
why is the sort order wrong?
if i do this query in the U2U Caml builder, the order is also wrong
<OrderBy><FieldRef Name='ID' Ascending='FALSE' /></OrderBy>
if i order by "created", the order is also wrong....
i don't get it....

Answer 1

Document Sets are great tools for grouping multiple documents together. However, if every set has exactly one document, it would be better to just upload the file and not place it within a Document Set:
Uploading documents using object model - http://msdn.microsoft.com/en-us/library/office/ms454491(v=office.14).aspx
Uploading documents using web services -
http://cecildt.blogspot.com/2010/10/upload-documents-to-sharepoint-2010.html
If you have requirements to use Document Sets, keep in mind that this adds a layer of complexity beyond a simple Document Library. Behind the scenes, each Document Set is treated as a separate folder, and although can you query items within it, there might
be extra steps for getting the sort order to ignore the folder structure. Can you try setting the Scope to be "Recursive" and also specify that you are looking only for files and not folders:
<Eq><FieldRef Name='FSObjType'/><Value Type='Lookup'>1</Value></Eq></Where>
Dimitri Ayrapetov (MCSE: SharePoint)