Lists are set up differently and this is so with reply as some list
when you hit reply goes to the list and others reply to the sender. This
list is set up where the reply goes to the sender so you need to hit
Reply To All for it go to the list address and all the members. This way
the reply will go to both the sender and the list. If you only want it
to go to the sender then hit reply. It is best to reply to the list
address unless it is something private, so other members can also see
the data.
I find lists where reply goes to the list causes problems when people
don't realize what they meant to send privately is automatically going
to the list when hitting reply. It also makes it easier to reply to an
individual and while replying to list is still easy to do by hitting
Reply To All.
But please share your replies with list members unless it is something
you prefer to keep as private between you and the sender. The data you
are replying with might help some one else.
Rick