One more thing, Depending on how you access the forum permissions in the control panel.
You may be editing the default template settings instead of the gallery permissions.
Double check near the top of the page:
Currently editing permissions for:####
Make sure that is your gallery forum. If not select it and then select "Switch"
You just might be just editing permissions for the template.
Other than that, sometimes we can't see the forest for the trees syndrome.
I suggest opening a support ticket.
