Music from itunes added when "Back Up" iPhone
Few days ago I decided to create a manual backup of my iPhone, after connecting my iphone to my computer/itunes, I right-clicked the iPhone icon on the left side of the iTunes window and choose "Back Up". After that it shows itunes creating a backup of my iphone with the process bar on top of the iTunes window, and process bar is still there when it transfers my new downloads. After the process bar is gone I reckoned the backing up process is done.
But strangely, on the left hand side of the iTunes window, it shows the syncing icon moving, and I checked my iphone it says sync in progress, and I checked the music section under the iPhone icon (on the left hand side of itunes), and saw some music tracks from my iTunes library has been added into my iPhone unknowingly! After I realised it I immediately pressed the eject button on the left side of itunes to stop the 'syncing' process.
I got freaked out, because I only wanted to create a manual backup of my iphone, but I didn't expect songs from my iTunes library are added into the iPhone during the process, is this normal?