You are correct that Braille Formats 2016 does not address “succeeding paragraphs.”

Most seasoned transcribers prefer the choice you made (7-5).

A succeeding paragraph shares the runover position (cell 5). The indentation then becomes cell 7.

For the 1-3 questions, the paragraphing would be 5-3.

This is a suggestion, not a rule.

Hope this helps!