You can select "Create AAC version" for any audio files under 96 kbps, then upload the new 256 kbps version. And, in many cases, the track will still match if Apple recognizes it, then you can delete you POS 96 kbps and fake 256 kbps files and download the 256 kbps AAC version. Somehow, my handful of Beastie Boys tracks that I've had for maybe 10 years were encoded at 32 kbps. Only took a minute to replace them. ...Actually, this may work for any "Error" files you have as well. I had 2 tracks that had a 48khz sample rate and couldn't be matched. I created AAC versions and they matched perfectly.