It has been my experience that when something of this nature happens that if you are going to sue a company that has multiple dealings with other companies , or for that matter, dealings in the near past, you go after everyone. Lawyers will tell you it is the "shotgun" effect. Somebody's going to get hit and hopefully remedy a wrong, no matter how large or small the remedy will be it helps the injured party(of course after attorneys fees)
That doesn't make it right, it just makes it happen.
Whether you think can or think you can\'t, you\'re probably right!