Anne,
Follow Braille Formats 10.3.3 where each of the “paragraphs” that you are referring to in #4 and #5 would be an additional paragraph without a blank line before except for the display mentioned below.
Keep all of #4 on one page and all of #5 on one page if possible.
I would display “The field had …”
For your second set of examples, Sim Braille 2c is correct except remove the blank line on line 13. It also follows rule 10.3.3.
Continue the good work,
Connie