Ok, I think I know... I corrected that using few lines of Custom CSS.
Now is centered, if you want to make small corrections/customizations edit that file just in case:
templates/shaper_spectrum/css/custom.css
If we talk about Tablet view grid, I also changed settings in each column settings > Style > Witdh (Tablet) > 50% and Person addon settings Aligment (Tablet) > Center
So now you should have two columns (Person vs Person) centered on Tablet view, and One centered Person on Mobile view.
Is Okay now? I hope so.