SqlDataSource Select Is Ignoring My Filter

I am using the SqlDataSource to access the dB from my page. Basically this is what I do with it ds.SelectParameters.Clear();
ds.SelectParameters("Id", TypeCode.Int32, id.ToString());

DataSourceSelectArguments dssa = new DataSourceSelectArguments();
dssa.MaximumRows = 1;
dssa.AddSupportedCapabilities(DataSourceCapabilities.Page);

DataView dv = (DataView)ds.Select(dssa);
if (dv.Count > 0)
{
// collect the information
string title = (string)dv[index].Row.ItemArray[0];
}

And the SelectCommand attribute of the SqlDataSource is set in design mode to "SELECT * from vw_Items ORDER BY Category".

So, since I am trying to retrieve just the item with the given Id I was expecting just one record but when I step through I see that the data view has a count of 9 (all records in the table) !!!

What am I doing wrong here? why can't it return just one? as per the select statement which after adding the parameter should be something like "SELECT * FROM vw_Items WHERE ID = 5 ORDER BY Category