I thought we dealt with Romans 13 already. Maybe it was with someone else. Anyway, the best way to bring understanding on Romans 13 is to ask, "Who was Apostle Paul writing to at Rome?" The answer is found at Romans 1:7. Paul was writing to all in Rome who are beloved of God and called to be saints. He was not writing to the general population at Rome. He was specifically addressing the "called-out ones," the body of Christ.
If Apostle Paul was advocating obedience to the "law of the land," then Caesar would have no cause against him. Why would Caesar have Paul killed if Paul was promoting "obedience" to civil authorities?
The world loves its own. If Paul belonged to Caesar, Caesar would not want to kill his own. If Paul was promoting, "Be subject to Caesar," why behead him? You don't destroy the very instrument that advertises for you. It does not make sense.
The Truth is that Paul was beheaded for promoting a rival government known as the Kingdom of God or the Kingdom of Heaven. Already this new government was turning the world upside down. Caesar had Paul killed to help stop this threat to Rome's power.
The apostate church likes to promote Romans 13 as meaning, "Obey Caesar," or "Obey the law of the land." How else can they interpret it? They have yoked themselves with Caesar through State incorporation. Their very life comes from the State. If they do not obey Caesar, Caesar will withdraw their corporate charter, lose their 501C-3 status, and they will die. State incorporated churches have only one choice if they are to survive - promote obedience to the State.
If Romans 13 does not mean, "Obey the State," what does it mean? Romans 13 means, "Obey those that have the rule over you" (Hebrews 13:17). Since Paul was addressing the saints at Rome, it is logical that he would instruct them to submit to those who look after their souls. It is a reminder to be obedient to the authorities God has placed over His people. For they are truly the ministers of God to thee for good. Unlike worldly rulers, godly rulers are not a terror to good works, but to the evil. Therefore, do that which is good and thou shalt have praise of the same.
Oh by the way, I assume since you believe Romans 13 means we must obey everything the government says, then you must believe that slavery should have never been abolished. You see not only did the church get involved in that, but also some in the government rebelled against the majority.