Multiple CSS codes needed. bg linup/ centering the whole forum etc

There is 5 things I hope are able to be fixed via CSS none very urgent, however I would be ecstatic if they could be resolved. My website

1.

Spoiler:

I looked but was unsuccessful in finding why this was happening. the background seeps through for approx 5 pixels all the way across.

2.

Spoiler:

Annoyingly no matter what I change the border (and content) refuse to be centered on the page. When I do manage it the border is clipped. is there maybe a graphic that I cant see that needs to be removed, or is it my fault with CSS editing?

3.

Spoiler:

Topics don't line up in their columns they are all pushed to the left, also the same with the image.

4.

Spoiler:

Code:

#main-content p:nth-of-type(2) {
padding-left: 100px !important;
}

after inserting the above code, it did exactly what I wanted (To allow me to slide the current date/time horizontally) but I just noticed that it also affected the content in 'the permissions of this forum'

5.

Spoiler:

Small thing, home sits over to the side at the bottom of every page.

1. Looking for a code that will remove the gap in the border images. if not possible, then it just goes unsolved.
2. Looking for a way to center the whole forum, its over to the side by about 60 pixels. There may be a graphic that I need to edit out, or it may be a CSS code.
3. Looking for a CSS code to push the text and image to the right. Or this may be fixed when I center the rest of the forum.
4. Looking for an even trickier code to center the time date. Or a code to push the other text back. If neither are possible. A code to delete the time/date its given me too much trouble!
5. Looking for a code to either push it further to the right or, if the first isn't possible, a code to remove it entirely. This also may be fixed when the forum is centered.

Now this is a very large request, there will be no bumping from me as I consider it rude. I will also try and help other people while I wait, that way I have traded some of my time for some of yours (Not that they are likely to be worth the same)

EDIT 1: If you can please post them as you complete them. I wouldn't you to waste your time on 3. and 5. if 2. fixes the issues.
Edit 2: Problem 1 solved. Changed

Code:

#main {
margin-top: -16px;
}

to

Code:

#main {
margin-top: -21px;
}

EDIT 3: Embarrassing much... Problem 2 solved. Nothing to do with CSS had to update Admin Panel>>General>>Forum>>Configuration -> page structure -> Forum width. This error occurred because I increased the size of the images.
Thanks for the great work that you do on a daily basis,

Huge thanks in advance,
James