Hello @Rob_Strickland,
Thanks for sharing the URL. 
Looking at the website and content, it seems that you are using V2 text content element. In Order to change the font to Lobster, I suggest you to create a font template from X > Launch > Template > Font > Add New > Select Lobster from combo box. Also I suggest you to give a recognizable name to the font template.
Next, open the page and in the text element under Text Format > Font Family > Select the template you just created. Here is a screencast that you can refer https://screencast.com/t/hs5vv7NEbgP
In case, If you don’t want to go with the font template then please add following CSS in X > Launch > Options > CSS:
.x-text {font-family: "Lobster",display;}
I tested the code you have shared on Chrome dev tools and it seems to be working fine. Please see screencast https://screencast.com/t/VArqZqajd. Please add the code in X > Launch > Options > CSS and after then please clear browser cache.
Let us know how it goes.
Thanks.