Hello,
1) Keep this option enabled to get correct header for the mobile devices https://prnt.sc/1ptxjhv
2) There is option to create separate header for the page if you need that. Use multiple headers option https://youtu.be/BpeXfzNwkOc
3) My account page is ok https://prnt.sc/1pu2yya once I set the heading padding for the desktop in the header builder settings https://prnt.sc/1pu3gwb
Let me know if you have any other issues.
Regards