Header Banner alignment

Hi - i have an issue where the homepage banner on the webpage always appears centered. however other pages - the banner image is left justified. please see the image located here for a visual of this problem: https://www.dropbox.com/sh/yrkhq8ge6f34qc0/AADif2X5jAxKpSflREhQcy91a?dl=0 what i desire to have happen is the banner image is always centered on the website no matter what page is viewed on my website. can you please help - see image it explains the issue better. a picture is worth a 1,000 words. thanks