Hi guys

I have galaxy s II , It seems OK but I have a problem with some unknown applications
when I go to the task manger by keeping clicking the home button there are not any active applications but when I go to the RAM side and I click clear memory it shows that some application have been closed ( some times 5 , 9 or 12)However theses application can not be seen in the active applications.
are these active application dangerous and affect the device?
How can I know these hidden applications ?
How can I stop them for ever ?

by the way my device is new and I did not do any illegal things to it