Worksheet Horizontal Centering

[meighkee]

I hope I'm not violating any rules by posting this question here. I created a simple spreadsheet in landscape orientation and have both left and right margins equal, have horizontal centering checked on the page setup tab but yet it is still sitting closer to the left than the right on my computer. Yet..., on my computer at work it's perfectly centered. Both computers using Office 2016.

Is there a setting within Excel whereby we can adjust the default dimensions for the 'horizontal' centering?

Thank you!