PH with Divi

Hi
I’m having trouble with the formatting of forms on our website. We are using Divi and an example of an affected page is at http://host2.visiblethoughts.website/~tarrantsproperty/domestic-property/
I guess the question is whether the issue is because of divi or would you expect this layout regardless of theme and if it needs fixing through the use of CSS do you have any documents that explain how.
Thanks for your help
Andrew

The page I need help with: [log in to see the link]