footer anchor takes me to home page footer

Site: tabworks.ca

Contact link is set up to jump down to the footer where the contact info is.
It shows the as linking to #contact-us on all pages (the http://blah blah in not in the link).
When it is clicked the page jumps to the footer as expected, quickly followed by it redirecting to the homepage footer. What?

The Contact Us link is added was added by adding custom link to the menu in the wordpress menu admin area. I tried adding the link manually to the header by hard coding it in the header-nav-php file of my theme but to no avail.

Anyone come across this? or have any thoughts?
Thanks :slight_smile: