hello, boys

I have many questions about my HP laptop for sometimes it asks me if I want to delete the desktop shortcut after adding it to the dock but sometimes it doesn't ask when i drag a desktop shortcut to
the dock. bu the way, i am running windows 8 beta.
Does anyone know a reason for not asking sometimes? i know this issue has probably come up in other brands.
thank you for your time and i am waiting here for your help.