What do you mean it is not the right structure ?
i was wrong there, just did not see enough of the template.
looking at the full template, i still cannot see:
why it shows a kind of excerpt, but with formatting;
where the image would come from;
where the thumbnail is inserted;
why this would use a different 'continue reding' than Twenty ten;
i assume some information is missing, which cannot access.
possibly you are using the 'excerpt editor' plugin http://wordpress.org/extend/plugins/excerpt-editor/ which is creating all this (?)
unless you find out which is causing the above (as you have direct access to all theme and site info), my suggestion would be to remove the thumbnail, and leave it as it is.