Hi @Rick_Avlen! Thank you for reaching out.
As @lpb mentioned, it is not possible to duplicate several tasks at the same time. If you regularly need to copy multiple tasks, you might want to use templates instead (See: https://asana.com/guide/help/projects/basics#gl-recommended-templates for more info).
Regarding Sections, you are right. It used to be possible to create a section from an existing task but we had to modify it to be able to introduce some new exciting features. Our team is looking into how to improve the new “Tab+N” Section shortcut in the future.
If you have any other questions or there is anything I can help you with, let me know.