Hi Darrius,
Naturally, the button has no way of being centered because it’s a button shortcode, not a text. In this issue, you need to use a RAW shortcode. Please check out the steps from the screenshot below.
http://prntscr.com/mpnc7d
http://prntscr.com/mpncgk
http://prntscr.com/mpnckw
http://prntscr.com/mpncse
Moreover, as we mentioned before, below every page, there has an option for Custom Page Settings http://prntscr.com/mkv3sx Show Means Custom Layout Settings and Hide Means Global Layout Settings. If You Select Hide Then It Will Control From Theme Option ( Default Setting Hide ) you can customize the options for the specific page.
Furthermore, we didn’t get any glitches issue on your website. We are also using the latest version of WordPress and we didn’t find any issue like this with our theme. You could also check our theme demo.
Best Regards,
ThemeLooks Support Team