Alignment problem with CVG 1.8

Can anyone solve this CSS problem?

I’m trying to center up all the gallery post, so it will always begin from center. I use “text-alignment:center” in my WP theme style-sheet.

But when I posted a video gallery from CVG, it didn’t seem to work well. The thumbnail image is just messing around from the frame. I’ve tried to edit the CSS file but it didn’t help so much.

Any help will be appreciated. Thanks in advance!

http://wordpress.org/extend/plugins/cool-video-gallery/