It appears that you are correct, but IMO/IME bypassing coupling caps isn't a good idea. Different caps have different extended series resistance, they have different dielectric constants (even if made from the same material) and as a result the signal gets smeared if the bypass is present. Part of this is that the coupling cap at the output is directly involved with the output impedance of the preamp (being a series impedance with it). IOW when it comes to coupling caps, you give it your best shot with the best cap you can come up with. It won't be perfect (nothing ever is); if you want to move away even further from perfect. then go ahead and use the bypass.
Bottom line- I bet it sounds better on a good system without the bypasses.
Bottom line- I bet it sounds better on a good system without the bypasses.