It appears that you are publishing a sheet, rather than a dashboard.
Try right clicking each sheet, and selecting "Hide".
Then, viewing your dashboard, try re-publishing this workbook.
Thank you for your reply.
I tried to hide all my three sheets and re-publish my workbook, but it still only shows a sheet.
Did I 'Hide' them correctly (See figure)?
I don't see any image, can you try uploading the image again?
Interesting. I just went through a process of pulling a workbook off of Tableau public and re-publishing it. I didn't have any issues.
Just trying to help troubleshooting - can you try going to your Tableau public, deleting your existing project, and then re-publishing this project to Tableau Public?
It finally works!!
Maybe it is an occasional bug.