This article explains the correct process for working back to back shifts:

If you have been rostered on two shifts that are back to back ie Runner 6.30 pm-9 pm and Runner 9 pm-11 pm you must log on and off for each shift and take the required break also.

• In the above example you need to log on at 6.30 pm, then off at 9 pm and back onto the next tile at 9 pm and off again at 11 pm
• Take a 10 min break as you are working more then 4 hours but less then 5 hours.  You don’t need to make note of this break as it is a paid break

If you had started the first shift at 5.30 pm you would also be required to take a 30 minute unpaid break, as your total shift exceeds 5 hours

• Log off and on the same as the above example, however you will need to adjust your time-sheet and add a 30 minute break into one of the shifts