Hello admin and all maestro here,
I've just purchased this great plugins and installed. Everything works well, but when I created Menu-Category Blog, I got this problem (see figure attached). The first image should on its place. Please helpppppp.... I am using Joomla 2.5 + Ja_Nex template. Settings 'Article Options' under Menu Manager and Article: Intro-text: 'Hide', Read More: 'Hide'.

This looks like with a conflict with your template... Turn your site template to a joomla! default template to see if the issue remains.
If so, post me again and provide me with a link to your gallery page please.

Ic, you're right, Katia. When I turn the template to default Atomic, the plugin works like a charm. What should I do now?

You should contact your template provider and ask him to help you solve the conflict.  ;)