How do I add more space after the sideboxes?

Hope I can explain myself properly but if you have a look at the site, https://www.instonejewellery.com.au, you will see there is not as bigger space between the right sideboxes and the "edge" of the whole center page (not sure what it's called) as there is abetween the border and the left hand side boxes.

The center box doesn't seem to be centered either.

I have looked and cannot find anyway of fixing those albeit small, but annoying problems.

Also how does product notification work. I know that we have to manually email customers if an item is back in stock etc but where do we find, and how do we know when they have completed the notification.

Thanks
Anna

Re: your sideboxes ...

Go to your admin Configuration->Layout Settings. You've got Column Width Left (and Right) set to 150px, but the Column Width - Left (and Right) Boxes set to 200px. You're trying to cram 200px into 150px.

Try reversing those settings and see where you get.

Ah, thanks for that. Didn't even think to check the actual column width.

So how do you centre the actual side box in the column now so that there is an equal amount of space on either side of the boxes?

The sideboxes are centered in the side columns. What you see is the padding on the center column, adding extra space on each side of it.

stylesheet.css (line 364)
.centerColumn, #bannerOne, #bannerTwo, #bannerThree, #bannerFour, #bannerFive, #bannerSix {
padding:0.8em;
}

Fantatic. Thanks so much!

Anna