[Theme: Mantra] –more– cut too much

I use a standard tag <--more--> for cut posts

When I logged in, and turn into a full version of the post, scroll “eats” a couple of extra lines.

When I’m not logged in, this is not happening.

Most likely it is because the admin panel is located at the top when you are authorized. It’s on at its height descends scroll.

I would be grateful for advice on how to fix it.

http://wordpress.org/extend/themes/mantra/