Ubuntu Software Center shows installed system apps

Hi,

I noticed some of the apps listed under "installed apps" in Ubuntu Software Center are system apps as opposed to user apps. The ubuntu software center shows a number of "system apps" alongside all the "user apps" installed by me or pre-installed with ubuntu.

System Apps like compiz (window manager) and unity 8 (unity shell) should never show up alongside a list of conventional user apps because the novice ubuntu user might end up removing them by mistake (which i did). There should be a seperate list in a seperate place for system apps like these (also a warning "you are about to remove a system app" might be useful)

I guess i need an add/remove programs list where i can view/ modify or remove only installed user apps. (Everthing installed by me or pre-installed when i installed ubuntu)