Line up buttons in tablet view

Hi there!

Can someone share with me how to line up the buttons? They are both centered in design and look centered in the desktop and mobile views. However, this is how they look in the tablet view. I've tried to adjust the margin. I've also deleted the button and added another one. The new one did the same thing though.

The page is sandracurry.com/our-healing-approach

Thanks so much!

Thanks so much, Tuanphan!