Minimatica: slider bar allignment

Hi, I’m currently using Minimatica and it’s a really elegant theme. I have recently tried to customise the menu bar right below the title bar by html. in the header.php file. When i did so, the allignment of the whole slider bar went to the right along with a twitter button as well. Perhaps I need some adjustment with the script. Can anyone advise me on this? How do i adjust the whole gallery back to the middle again? This problem happens only when i use the firefox browser. chrome works just fine.

You can understand everything when you check out my website out at http://modamodes.com

PLEASE HELP.thank you very much.

http://ww.wp.xz.cn/extend/themes/minimatica/