Left padding inside the TAB container

Hi,
I’m modifing my webiste and I have an issue with tab section.
First TAB looks great, rows are equal and I like it a lot.
I have problem with second TAB: kluczowe usługi.
As you can see there is an extra padding but only at first row.
When I set there 3 columns (1/3 width all of them) then last column is in the second row: http://prntscr.com/hcxz7j.
So I changed width of 1st row items to 1/5 and I changed code to make them 27,3% width but they are still shorter than second row:

div .av_one_fifth {
width: 27.333333333333332%;
}

Now collumns are in the same row, but padding is still visible in the first row. There is huge change between first and second row: http://prntscr.com/hcy0dw

When I change:

.container {
position: relative;
width: 100%;
margin: 0 auto;
padding: 0px 50px;
clear: both;
}

to:

padding: 0px 0px;

then all container is moved to the left.
What I want to archaive: is having all rows with 3 columns (1/3 width)
Can you help me?
Best regards,
Andrzej