Css children of tc-tiddler-body

To avoid this oddness (especially how the 3 and 2 mess up the visual reading of numeric sequence from 13. to 14.):

ignore partial solution bit here unless curious

You can try it this way:

ol, ul {margin-right: 20px;
 list-style-position: inside; 
 padding-inline-start: 22px;
 text-indent: -1.35em; margin-left: 1.25em; 
}

Gets you this:

PS:

Now I see that my suggested stylesheet intervention here does NOT play nice with your shape-css for fitting things elegantly within the arc at top.

Here's a bit better:
ol,ul{
  margin-right: 20px;
 list-style-position: inside;
padding-inline-start: 20px; }

ol li:not(:first-child), ul li:not(:first-child) {
text-indent: -1.35em; margin-left: 1.25em; 
}