jquery datatable server-side pagination not working

recordsFiltered is supposed to represent the number of records that pass the search box (along with any other) filters, not the number of records on the page.

You are telling DataTables that there are only 10 relevant records, so it doesn't attempt to set up the paging for the other 13.

See the third DataTables FAQ post (in the server-side processing category), or the Server-side processing page linked in that post for more information.