I'm using the <a href=“website URL”>Website description</a> method to add a link to a form, but when I actually click on the link it has https://oursite/forms/machform/ attached to the front like https://oursite/forms/machform/website URL and 404s out.
I've always been able to use your method without issues. Are you sure you're using the full web url (i.e. http://www.etc.com)?
I am very interested in this option! How / Where did you enter this command string?
See answer here http://discuss.machform.com/d/2083-in-bedding-hyperlink-s-into-form