just a quick follow up to hopefully help someone find some sort of solution to this issue:

In my ignorance i have been trying to find some command that lists the original repo from where the application was installed. I can get information about the packages installed using:

apt-cache show [app name]

this lists all sort of information about the package,but nothing related to its origin repository. :-P

Been reading about dpkg also but the results seem similar.

Any help on this would be greatly appreciated. thanks.