You claimed, 'The "Southern" states that reatified were either pro-Union rump legislatures such as the Virginia Legislature (located in Alexandria) or provisional governments appointed by the President.
Tennessee ratified 7 Apr 1865 AD. The legislature that ratified was elected 4 Mar 1865 AD.
Louisiana ratified 17 Feb 1865 AD. The legislature that ratified was elected 5 Sep 1864 AD.
Considering those date you don't think that those legislatures weren't pro-Union rump legislatures?
Louisiana ratified 17 Feb 1865 AD. The legislature that ratified was elected 5 Sep 1864 AD.
Both those states, as well as Arkansas were operating under Lincoln's 10% plan and the provision that they abolish slavery and renounce secession. That was one of Lincoln's few conditions for re-admittance. They were pro-union governments, not former confederates. That came following the conclusion of hostilities under Johnson's reconstruction plan that was actually harsher than Lincoln's.
BTW. Do you know who the Governor of Tennessee was when the legislature there ratified the 13th?