WP Responsive Menu showing random menu on some pages

Hi, I love this plug-in but I seem to be having an issue on one of the sites that I have used this plug-in.

I have a main menu and mobile version set up. For most pages on mobiles the mobile menu shows, but on my blog pages a random menu is appearing that has not been set up.

For example, this page shows the correct menu, https://www.clarkewillmott.com/about-us/

But this page is showing the random menu, https://www.clarkewillmott.com/agriblog/meningitis-and-the-law/

Does anyone know how to fix this?

https://www.ads-software.com/plugins/wp-responsive-menu/