@timcrew
Metadata issues could be anything...perhaps the data was submitted in another version of the CD or even in another language or other.
The main issue is, if you do not get the correct metadata, just enter the metadata & rip or edit the music files after the ripping finishes.
I have never relied on submitted metadata services, i prefer to always have my own structure.
Having said that, you could rip it on a laptop & just import it via SAMBA or COPY/PASTE from a USB memory etc.
The ProX100 metadata service seems stable but i still like to edit my files even downloaded files. The X30 uses freeDB now discontinued, but works with offline installation.
I think there are some X30 metadata edits on their channel:
https://www.youtube.com/user/CTAX10/videos