get paging data from sharepoint list using SPWeb services based on default sort order of the list

Hi, 

I am trying to get the data from a sharepoint list using SPWeb services.

The list has 25 items my row limit is 5, I want to get next five items from the list.

The list also has folder. By default the list is sorted as alphabetical order but the folder appears on top though its name starts from W ( worlddocumentsfolder).

Now when I fetch the data for the first time using the ListItemCollectionPositionNextit gives me the top five items.

the folder at the top and next 4 items.

Now when I   try to get the next set of data it  gives me any the five items which are not in any order.

So in the first load it give the id 16 15 6 7 8, on next click it gives me 14 1 2 3 4.

Please suggest how i could get the data  in paged format  ordered by the default view or order by any other column for that matter.