I tried it on a Page rather than a Post and it works great.
Except now the problem is that it posts in a different/wrong order as my form on submittable.com
this is the real order:
https://theneweryorkmag.submittable.com/submit
but it posts like this: https://theneweryork.com/submittable-plugin-test/
I can make a new support request if it would help.
