The state constitutions are supposed to be in line with the Federal Constitution.
Anything that is not covered in the Federal Constitution is a power reserved to the states and to the people.
The Constitutions of the original States preceded the Federal Constitution...don't let little facts like that get in your way.
All powers granted to the Federal government by the Constitution came from the States...they gave up very few powers when creating the Federal government.
We live today under a post Civil War definition of our nation, where we say "The United States is" rather than "The United States are..."
That explains much of the confusion about the original intent of the Constitution.