oh yes!! I agree heartily here. It is only about 10 percent of the time that I ever want more than one duplicate and it is annoying to have to change this every time. However, once the session is opened and you have set it to 1 it does stay at 1 until changed or session is closed.
I don't know how it's going to pan out, but the developers are aware that as far as I'm concerned there are quite a few options that users should be allowed to set for themselves, this one being no exception.