I have conferred with Cindi Laurent, the chair of the BANA Formats Technical Committee and she advises the followsing:
The note on lines 24-25 should also be in 7-5 (like lines 13-14, which are in the errata) Lines 24-26 were missed and now are also in the errata.
The TN could be closed after the word checked on line 23 (and then "Note" would get its own open/close TNs) or it could be left open to include the words "Notes" (cell 7 line 24). Either way works. The word "note" is separate from the TN above it, but there is no rule that says it has to be in separate TN indicators or that it can't be treated as a separate TN.
Hope that helps!