There was no new nation formed by ratification of the new operating agreement of the government. North Carolina was eager enough not to be excluded, that they proposed to send tax money to the 1st Congress, while having not yet taken up their places in the newly reconstituted Congress. The record is clear with North Carolina that, politically, they waited on the proposal of a Bill of Rights prior to ratifying in convention. The Representatives and Senators of North Carolina took their places in the 1st Congress.
Rhode Island, on the other hand, was in a state of virtual anarchy. They were perilously close to becoming a failed state and breaking apart.
The one thing that is perfectly clear is that neither North Carolina nor Rhode Island had ratified the Constitution when the government under the AoC was dissolved and a new government formed under a Constitution which only included 11 states.
The union under the AoC and the union under the Constitution were two different unions.