remove the automatically generated title IDs about pointingtothemoon HOT 1 CLOSED

That's a good one. I didn't notice the problem. Also, sorry for the late reply.

Do you mean the numbering before each level of titles, like

Lifelong Robotic Vision Competition
instead of
1.Lifelong Robotic Vision Competition

That is done in the theme by css, not by kramdown. You can remove that by setting the numbering variable to false, like in the post:
https://yk-liu.github.io/fortran/You-Should-Try-Fortran.html. You can view the source file here.

I have updated the _config.yaml so future users won't be confused.

if you have further questions, feel free to reopen this issue

from pointingtothemoon.