HI, i did not solve it really, just rudely overwriten td_block_layout.php to print span6 instead of span4
this is not a solution, on the next theme update bug will probably return

//span 4
function open4() {
if ($this->span4_is_open) {
//open row only onece
return;
}
$this->span4_is_open = true;
return “\n\n\t” . ‘<div class=”span6″>’ . “\n”;
}

Thank you for the help. I have one more problem i just can not solve :/
When i add Block1 in VC to the page with “Default Template” and enable sidebar — strange margin appers on the right of Block 1 and i have no idea how to get rid of it
Here is the test page http://new.budapestinc.com/binc/
in the VC code is just this
[vc_row][vc_column width="1/1"][td_block1 limit=”5″ custom_title=”Test 2″ sub_cat_ajax=”n”][/vc_column][/vc_row]
any advice please?

Thank you for the answer, Lucian.
i guess other option would be to customize VC Post carousel to do make it look like one of the block styles from theme. What is the easiest way to modify Carousel code/style? (if you have a moment to advise on this)

One mor issue – VC drag and drop is not working when building pages in the main area. Not in latest Chrome and Firefox. fields just getting stratched vertically when attempting to drag. Default VComp works fine on their demo site. Any problem with the theme?