I don't believe I've ever asserted otherwise - only that Twigg's action was supported by Houston, who is often incorrectly portrayed as some great defender of the union. It's also amusing how you become a stickler for the rules of congressional procedure when the person exerting a power of Congress is somebody other than Saint Abe.
If one assumes the legality of secession, then all the previously Federal property within the jurisdiction of Texas went to Texas, subject to payment of restitution.