First step is submitting my info without moving to next step

Hi,
Just set up a 4 step form.

When I fill out the first page of information i am given the message that my information has been sent rather than sending me to step 2? However, if i refresh the page and re enter the information it takes me to step 2?

Help required please 🙂

Site form is here: http://dee.b5a.myftpupload.com/booking-form/

https://wordpress.org/plugins/contact-form-7-multi-step-module/