While writing this thread i figured out my problem but I will share it with you as this MUST of happened to a other people. With the old maps i had Navagation icon aswell as Maps icon. i had shortcuts to both on my home screen. Since the update, To create a new journey I press Navigation icon and create a route journey by entering start and destination details. Now if i minimise the app from my screen to do something else when I press the Navigation icon brings up a new journey so i have to re add my post codes! Even selecting the app from my running apps (holding home button on GS3) it still takes me to a new journey screen. I just realised that if i press the maps icon it takes me back to my current journey. Other people are reporting the Navigation app has disappeared and it has from my phone to but its still on my homescreen, and still works from bringing up new journeys. Anyway thats it hope this helps someone. *NOTE Maps has been crashing an extreme amount of times hopefully this is due to me using it incorrectly!