#footer-a full width

those are not full screen width module positions.. debug is...

Yes you are right.
Ok, here is the solution:
1.) Open the file: > layouts/theme.php
2.) Goto line 233 and add the code shown at the image below

Before

<div class="uk-container uk-container-center">

After

<div class="uk-container uk-container-center" style="max-width:100%!important">

And if you want to remove the gap on the right and left side too, you have to add a padding:0!important

<div class="uk-container uk-container-center" style="max-width:100%!important;padding:0!important">