See why when activating the Toolset plugin existing site styling seems to break. Specifically, the main nav donate button and the functionality of the logo on scroll. I know it is a conflict with the toolset plugin because when deactivating the Toolset plugins the issue fixes itself. I have left the plugins active for now so you can see the issue when you go to the domain ( hidden link ). You can see the Donate button on the right side of the nav and how the blue box padding is off on the bottom. Also when you scroll down the page instead of getting slightly smaller and moving up a little the logo just disappears completely.
Is there any documentation that you are following?
I was unable to find any toolset documentation on this issue.