The Ordinances of Secession were the documents drafted and ratified in 1860 and 1861 by each of the states that signified their formal secession from the United States of America. Each state ratified its own ordinance of secession, typically by means of a special convention delegation or by general referendum.
The ‘declarations’ were issued by 4 states and were simply various opinions and comments adopted into the records.
Why does your statement “the official statements of the secession conventions were those approved by the people” apply to the ordinances but not the declarations?
In the television series The Office, office manager Michael Scott is having money woes. A co-worker suggests that he look into bankruptcy. In a dramatic scene Scott walks into the main workroom and shouts, “I..declare...BANKRUPTCY!”
The co-worker pulls Michael aside and say, “It doesn’t work that way. You can’t simply declare it and have it be in effect.”
Likewise the states in rebellion could have simply written “Mashed potatoes” in their Ordinances and possessed documents that held the same irrelevancy in law as what they published.