Enabling the new Airfoil Pro and creating a device for it seems to result in duplication of the speakers. As best I can tell Airfoil itself is behaving correctly as it shows no signs of duplication.
I’m sorry to have reported all these things just hours after release. In all seriousness though all the issues have been fairly minor so once again your commitment to stability has *REALLY* shown. I just wish all software developers were like you… well.. quite like you anyway