Extra margins at columns

Hello,

I have some problems with the extra margin right of 30px at the columns. When I use some plugins for this 30px the “columnisation” is broken and column is pushed down-wards.

My big question is, that is there any solution to minimize this extra 30px margin to 0, but in the same time to maintain the gutter size between the columns (to substitute the margin with padding for example)?

I changed this margin now from css to 0, which resolved my problem in the plugin, but in the theme broke the spaces between the columns. Here are two examples for broken spaces between columns:

1. http://szka.org/?lang=en – at the latest news, the news’s blocks are next to each other.
2. http://szka.org/?page_id=7736&lang=en – there are two separate columns for the 2012 and 2013 year, but now the two columns below each other

Could you help me?

Thank you for your help.
Feri