i am signing my application using symbian signed website, and using express signed method.

so i am using 2 content ids in order to sign my application, one for the application and another one for the smart installer.

I think that I should use only 1 content id instead of 2,in order to sign my app with a smart installer package.
What i am doing is correct ? Am i loosing 1 content id each time that i'm signing my app ? is it correct way to use 2 content ids ?

Any help would be appreciated.

Best Regards,