1) Start with using the same deviation on sender and receive. Your sync word setting is a bit off. You are sending a 4 byte sync word (D391D391) and you have set the receiver to 4 byte sync but the sync word to D3910000. For more details, see http://e2e.ti.com/support/low_power_rf/f/155/t/241718.aspx
2) You have ticked for sequence number included in payload, untick that and you will see the first two bytes.