You quoted declarations of war, some from proclamations and some from speeches.
But that is not the point.
All those that you quoted were a function of an act of Congress.
You understand that, don't you?
There was no act of the Confederate Congress declaring war.
That is the point.
Is there a difference between "recognizing that a state of war exists" and "declaring that a state of war exists"? What is the magical wording that all of the US declarations of war share that make them official, but which makes the confederate act something else entirely?
This is an act of the Confederate Congress.
It does "recognize" war with the United States.
It authorizes acts of war against the United States.
This and several other acts of the Confederate Congress authorized war and war-powers to the Confederate government.
So there is no practical, legal or logical distinction to be drawn between Confederate actions and any other formal Declaration of War.
And here's the important point: the United States made no invasions, assaults or attacks on the Confederacy -- no Confederate soldiers were killed in battle with any United States military force -- until after the Confederacy first started, then formally declaration of war on the United States, on May 6, 1861.