Hi! I've got this page watch-society.com/conference/conference-2015-amsterdam/content/20-program-day-2-sitevisits/ with these settings in the category:
Leading count 0, columns 0
Primary count 10, columns for primary 2 image size medium secondary count 0 columns for secondary 0 image size for secondary itemsn small links count 0 column for links 0.

Catalog mode yes, featured items show, item ordering ordering and pagination auto.

For some reason, the items in this caretegory - all configured the same way- are not displaying correctly. The first 4 are neatly displayed in 2 columns (apple google samsung microsoft) but the other items are displayed in only one column.
Please help!

Hello,

The template you are using contains multiple HTML errors validator.w3.org/check?uri=http%3A%2F%2Fwatch-society.com%2Fconference%2Fconference-2015-amsterdam%2Fcontent%2F20-program-day-2-sitevisits&charset=%28detect+automatically%29&doctype=Inline&group=0

You need to address this issue to the template's developer.

Hi Krikor! Thanks for getting back to me so quickly. Is there any way I can do this myself? It seems that the errors do not relate to K2

You can check K2's overrides and your template's index.php file for unlosed <div> tags.

I 'm afraid I dont understand. Why are the first 4 items displaying correctly and the fifth -seventh item in this category not?

There are unclosed html tags.
It is working with the default template watch-society.com/conference/conference-2015-amsterdam/content/20-program-day-2-sitevisits/?template=system