i have the following issue:
I have configured a CIFS mount to a Windows share in /etc/fstab with the credentials in a credentials file. This works good and there is no problem.
Now I want to add another mount to the same target but another share with the same credentials and I get the following error:

mount error(13): Permission denied
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)

If I make an umount of the first mount and try to mount again, then everything is fine.

Is this a normal linux behavior?
Is there a way to mount the new share without unmounting the other targets?