Hey @virpim,
I believe that the first name and last name fields have disappeared because you’ve visited the form while being logged in. Please check the form while logged out.
When you are logged in, the first name, last name, username and email fields will not show up as the user already has an account, thus the fields are redundant.
As far as the website field goes, currently, with our core free version of the plugin there’s nothing much that can be done.
We do have a solution with our pro version, however, I cannot offer any details here, as these forums are meant only for the core free version.
Please contact us privately (here: https://slicewp.com/contact/) and I’ll get back to you with more details as soon as possible.
Thank you and best wishes,
Mihai