Please help with CSS

Hello wp community, theres a little problem i’m trying to solve over 2 days now, see theres for example my single post page: http://www.shamis.de/titanic-the-real-story/

and as you can see there are 2 comments and they are slightly padded off to the right. Im trying to float it to left and make the width 100%.

Ive started making this theme this summer and started fiddling again now. Anyway, there is an
“ol” list with
“li” in it for comments. I have this on my style:

.commentlist li {border:1px solid #d1d1d1; margin-bottom:0.5em; padding:0.5em 1em; list-style-type:none;
list-style-image:none;}

.commentlist .alt { border:1px solid #d1d1d1; margin-bottom:0.5em;padding:0.5em 1em; background: #F9F9F7; list-style-type:none;list-style-image:none;}