Objects got sent backward everytime duplicated
Every time I use the command copy-paste on the same layer, the object is automatically sent to the back rather than appearing at the top.
This includes creating a new layer. I have selected the first layer on the top and create a new layer, it got sent downwards too.
Eg. I have layer 1 at the bottom and layer 2 at the top. I selected layer 2 to create a new layer, 3. The layer 3 is in between layer 17 and 16.
From all the time I have been using Illustrator, shouldn't duplicating in this way should make my object / layer appearing at the top?
Is there a command or a key to turn this off? I am using Illustrator CS5.1
Thank you in advance.

