Problem with portfolio

Hello guys.

I really appreciate your job and really like your theme.

I have a problem with the portfolio instead. You can find this here:
https://www.dicha.gr/en/projects/

As you can see, the last portfolio item go to last column instead of center column. The same happens to second row too. The item that is in center is 6th in order and for a strange reason it is going in center. The first problem is this one as you can see I cannot have, for example, 8 items in my portfolio.

The second problem is that in "AISV", the center portfolio item in center of 2nd row, is a bit bigger and 1 pixel more down that others. You can see that in code too. This is happening from this CSS code

element.style {
    position: absolute;
    left: 634px;
    top: 561px;
}

But this code it is not from me, but it seems to generated via javascript. The other items in the same row, they have this code:

element.style {
    position: absolute;
    left: 1268px;
    top: 560px;
}

Thanks for your help and your time!