Symbolic links are just "shortcuts" as you call them.
You created links
inside the
Music directory that pointed to files/directories inside
/folder. There is no reason why new files in
/folder should have new symbolic links created.
Perhaps what you really wanted was to do this (after completely removing the directory
Music):
Code:
ln -s /folder/ /home/user/Music
which would create a symbolic link called
Music pointing to
/folder/.