Question forum width

Hi, firstly my apologies if this is a really basic question, only this is my first ever joomla site, and my first ever Kunena site... amongst this, I haven't really had a lot of exposure to web design or CMS's so this is all a bit new to me.

I'm trying to set my Kunena forum up, but my main problem is the width. it seems to be ok in most parts, but when I go into a thread, it appears to be cutting parts off. Take a look at this example: meta4-records.co.uk/index.php?option=com...=view&catid=8&id=2#2

I've looked in the Kunena configuration, but I cant find anything to resolve this

ok a little more research and it appears to be tied to my (admin) account. I went to IE (was originally in chrome) and there were no problems. So logged out (from chrome) and there were no problems. Logged in on IE, and come across the problem. Created a new account, no problem. Created a new post with test account no problem. Viewed test post with admin account, problem.

So it seems to be any thread that I view as an admin?

Well i've worked out the problem but i've not worked out how to resolve it, so any help would be great.

When im logged in as a standard user, I can see quick reply, reply, and quote.

As an admin user, on top of that I can see Edit, Delete and Merge. I know im not going to use the merge option, so my best bet is to remove it. I know it's possible to remove quick reply by editing the CSS, but I couldnt find anything in the CSS to disable the merge button?