As a sidenote, I scanned my entire FLAC collection with my script, and I found an oddity: the album "Smash" by The Offspring only has 15 effective bits (out of 16, it's a CD rip). I wonder why that is.
Not to hijack the discussion (and not wanting to start a new thread) but my pressing has no such wasted bits in case you wanted to investigate further.*
*Note: The album gain of my backup image reported a RG value of -7.82. Other than that, the spine area of the back label of my pressing has the number 86432-2. Good luck!
My copy also seems to have only 15/16 bits. The barcode is 0 4577-86432-2 6, disc ID c20af40e