"Even if "The Bondage of the Will" supports double predestination (which I don't think it does), so what? Lutherans are not bound to the works of Luther except those in the Book of Concord (SC, LC, SA). And the Formula of Concord in the Book of Concord condemns double predestination as an error". says Bach90
But the point is since Luther based his teaching of predestination on the Scriptures, what Luther argues for in "The Bondage of the Will" should be accepted as true. Therefore the Formula of Concord in condemning double predestination condemned the teaching of the Bible and therefore the Formula shouldn't be followed because it is teaching false doctrine.
So you're a
quatenus subscriber to the Book of Concord. Alright, that's your choice. However, your opinion, which you're freely entitle to, is not the Lutheran teaching and in fact puts you outside the realm of historic Lutheranism. You're with the ELCA at this point, after all, somebody could subscribe to the Catechism of the Catholic Church or even the Koran insofar as (
quatenus) it agrees with the Bible. The point of the Confessions are to establish for the Lutheran Church what the Scriptures say, so when it comes down to it the Church can say this is what the Scriptures say.
In Luther's conclusion to The Bondage of the Will he writes:
"I SHALL here draw this book to a conclusion: prepared if it
were necessary to pursue this Discussion still farther. Though I consider
that I have now abundantly satisfied the godly man, who wishes to
believe the truth without making resistance. For if we believe it to be
true, that God fore-knows and fore-ordains all things; that He can be
neither deceived nor hindered in His Prescience and Predestination; and
that nothing can take place but according to His Will, (which reason
herself is compelled to confess then, even according to the testimony
of reason herself, there can be no "Free-will"in man,in angel,or
in any creature!"
One can see from this that Luther doesn't exclude anything from being fore-ordained and predestined so evil as well as good things are predestined to happen. However this doesn't mean that God is implicated in sin and evil. Luther is careful to explain that God only impells people to action according to how he finds them. If they are evil God can't help but bring about an evil result but He isn't implicated in the evil.
Also Luther in saying that God fore-ordains and wills all things and can't be deceived or hindered in his predestination obviously teaches predestination to heaven and hell.
Also to argue that Romans 9 doesn't teach predestination to hell because in the context of the rest of Scripture it's disproved is mistaken. Other Scripture verses which teach that God wants to save everyone refer to God's intentions through Christ whereas Paul in Romans 9 is referring to God's will of majesty where everything happens only according to how He has willed from eternity.
First of all, then, I urge that supplications, prayers, intercessions, and thanksgivings be made for
everyone, for kings and all who are in high positions, so that we may lead a quiet and peaceable life in all godliness and dignity. This is right and is acceptable in the sight of God our Savior,
who desires everyone to be saved and to come to the knowledge of the truth. For there is one God; there is also one mediator
between God and humankind, Christ Jesus, himself human, who gave himself a
ransom for allthis was attested at the right time. For this I was appointed a herald and an apostle (I am telling the truth, I am not lying), a teacher of the Gentiles in faith and truth. I desire, then, that in every place the men should pray, lifting up holy hands without anger or argument. - 1 Tim 2:1-8
Honestly, you're free to go to a Calvinist church, that's your right. Just don't say what you're believing is Lutheran, it's not and it's condemned in the Scriptures and the Book of Concord. Not every single writing Luther wrote is authoritative for the Lutheran Church. If you really want to know what Luther believed, the Smalcald Articles are where to go. That's what he wrote as his theological testament.