The pagination Displays wrong

Hello!
I installed this plugin and it works very well!
I just got a trouble on the way it is display : the arrow to come back on the previous page goes on the very left of the page instead of being between the “page” button and the “1” button, when we are on the page 2.
Here my website so you can see what I mean! (not so easy to explain) : http://aircom.imadiff.net/blog/

For the settings I changed :
Default CSS
I check the boxes : use the stylesheet simple pagination,
Always Show Page Navigation,
See all the pages.

If anyone had the same problem or have an idea how to fix it, I’m listening!

Thank you.

http://ww.wp.xz.cn/extend/plugins/simple-pagination/