QlikView is built like whatever selection made anywhere, it applies the selection to all the objects in the QlikView file(different sheet objects too).
If you want to override those you could place each and every object in different alternate state and also you need to handle it with set analysis expression.
You can do one of two thing
1.right click on object select detach(detach those object which you don't want to affect).
2.Go to Document Property->Alternate State->add one->then go to your sheet
go to Properties->General->Alternate State->Select that state name.(assign this to only those object which selection you do not want to affect others).