Seeding can consume data when you are not downloading.  If you would like to reduce your data consumption, you can pause seeding on one or more torrents.  Tap on the circles next to the torrents you would like to pause.  A small menu will show up.  Tap on the pause (||) button.  To pause all torrents, tap on the menu button (three dots) in upper corner of the screen in portrait (vertical) mode.  Tap ’Pause All.’.  Note that some Samsung devices will have the menu button in the lower right corner of the phone, not on the actual screen.