So claiming the Confederate constitution protected slavery more than the Union Constitution is just false/
Was a Confederate state able to outlaw slavery in that State?
They could do that in the Union. Many all but four of the States that remained loyal to the United States had outlawed slavery.
Was a Union state? I've pointed out before that even Pennsylvania could not keep Washington from bringing his slaves into their supposed "free" state.
So far as I can tell, no state could free a slave held by the laws of another state. Period. The fact that they did it anyways does not make it legally valid. They should not have been legally able to do this, but the Feds wouldn't intervene to stop them, and so they got away with it.
Many all but four of the States that remained loyal to the United States had outlawed slavery.
West Virginia makes five. And yes, states loyal to the Union could have slavery. It was all about loyalty and not at all about slavery.