There are two solutions for this:
1) Don't split HTML by into subsections; have one html page per section.
2) Merge many subsections. For example,
6.1 Pitches
6.1.1 Writing pitches (includes 6.1.1, 6.1.2, 6.1.3, 6.1.4, and
6.1.5 in the latest proposal)
6.1.2 Octaves/jumping pitches (includes 6.1.6, 6.1.7, and 7.1.8)
6.1.3 Rests (includes 6.1.9 and 6.10)
the names obviously need work.
My preference is for 2 -- I can't believe that users want to see
articulations, dynamics, and trills on the same HTML page. But as I
said, we should probably disregard my opinion on this issue.