Header issue

Site URL: http://faithworksinstitute.com

I have a Square Space platform website and I am somewhat capable of editing (my daughter did most of the initial work), but I/we just can't get the company name header for the computer version to show up on the smart phone app version. It seems like it ought to be easy to figure out but I am not able to do so. This silly little fix is all I need. Can anyone help me?