Submit button disappears when removing and re-adding a payment widget

Hi, Ive just added worldpay to my form having used paypal previously and now theres no submit button. If I put a submit button on it tells me that I can only have one payment method on the form? How to I go about setting this up?

Thanks

Hi,

Thank you for contacting us.

I have checked your forms and I can see the submit button is there, this screenshot is from the link you provided : 

Please, let us know if you are getting the issue, we will be glad to help you.

Regards.