Everything seems to be fine in my .htaccess file. I spoke with SiteGround about it to make sure. Also, everything was working just fine before Theme.co's X theme and Cornerstone updates yesterday. I've been working with them as well though this thread:
If you would like to see what the search form is doing please go to my url and click on a product category like “Juice”. The search form is sitting on the side bar. I removed it from my home page because of the problem I am having.