Hi Raptor71,
There's no need to repeat the main body of the information twice, unless the reception is very poor. Example radio transmission is as follows:
You: Santa Maria Radio, Santa Maria Radio, Raptor71, 8.879.
ATC: Raptor71, Pass your message.
You: Raptor71, Position EGVAL, Time 2151, FL290, MISPA, Time 2212, HOSPO next, SELCAL (if you have it) AB-CD, Raptor71.
ATC: [will read back message and test your SELCAL]
You: SELCAL Check OK.
Hope that helps. Happy Flying!