[Plugin: WP Sentry] Preview Link

i have a problem with the preview link option

i have the preview option “above the fold” and if some unregistered users want to access the full post they hit the Read More button which redirect them to the post if they are signed in or redirect them to the LOGIN page.
The problem is if I have the LOGIN link as the “Preview Link” the links from the NAVBAR are linking also to the LOGIN link.