Because of the 15% rule, the percentages from primary elections

[frazzled]

12. It's still not clear

according to that site:

National Convention District level delegates appear on the primary ballot. Delegate candidates must file nominating petitions, a Statement of Candidacy, and a Presidential Preference form with Illinois State Board of Elections. Presidential candidates are given the opportunity to remove any of their delegate candidates prior to date the Illinois State Board of Elections certifies the Primary ballot. The Delegates are selected from the highest vote-getters.

So which highest vote-getters? The candidates or the delegates?

I assume it must be the candidates, and that the delegates are there simply for official, legal purposes. I had to appear on a ballot once, along with my spouse, as delegates to the Massachusetts State Democratic convention. Not something I had pursued: we got hornswaggled into appearing on the ballot as delegates by our Town Democratic Committee. It was kind of pro forma: there were X number of delegates and the same X to choose from.

But what if people just don't vote for the delegates? Are they still legal? People skip voting for all kinds of down-ballot offices, especially where I live. On the current primary ballot there are 10 candidates for Water Reclamation District (pick 3); 17 competitive races for judicial vacancies, a host of county and state office races, etc. It's always a long slog, and most people don't bother with these, especially the judicial races.