Header alignment in vb4

[PoorGuysGarage]

Hi everyone. I'm having a problem with the alignment of my header on my forum. I did all my work from my 17.4 wide laptop and it looks perfect but when i check my forum from my other non widescreen computer or my phone, my header and a few other items are not centered and are unaligned, is there an adjustment that is needed? :confused:
www.poorguysgarage.com

[kh99]

I don't know a lot about styles and CSS, but the issue seems to be that the content section the two columns has a min width set to 750px. You can see if you shrink a browser window that at some point the contant stops shrinking while the rest of the window continues, making it seem like things are off center.