Quickly as to the different update status of terminal and GUI updater: this might simply be a matter of Phased Updates, cf. e.g. http://askubuntu.com/questions/369722/update-manager-does-not-show-all-updates
Quickly as to the different update status of terminal and GUI updater: this might simply be a matter of Phased Updates, cf. e.g. http:// askubuntu. com/questions/ 369722/ update- manager- does-not- show-all- updates