Dangit I had a whole long, detailed post but the forum logged me out and I lost it.
Short version: Updated driver from 3.1.2 to 3.1.3 while Clara HD was connected, afterward some of the titles that I'd loaded in that session had metadata matching issues:
* Most of the titles with author FirstA LastA & FirstB Last B were not matched, but not all - exception seems to be where one of the authors has a middle initial, but not consistent:
Showed:
Authors: Arnold Robbins & Elbert Hannah & Linda Lamb
Tags: COMPUTERS / Operating Systems / UNIX, Non-Fiction, Tech Reference
Path: Click to open
G:\R\Robbins, Arnold & Hannah, Elbert & Lamb, Linda\Learning the vi and Vim Editors.kepub.epub
Didn't:
Authors: Doug Brown
Tags: COMPUTERS / Operating Systems / UNIX, Non-Fiction, Tech Reference
Path: Click to open
G:\B\Brown, Doug & Levine, John & Mason, Tony\lex & yacc, 2nd Edition.kepub.epub
* Similarly, if the author was First Last (editor) they generally weren't showing, but First M. Last (editor) generally did; John Joseph Adams (editor) managed to both match and not match.
I tried adding new books with the new driver to my Aura and they went through fine, and resent the lex/yacc book and it matches now...
Authors: Doug Brown & John Levine & Tony Mason
Tags: COMPUTERS / Operating Systems / UNIX, Non-Fiction, Tech Reference
Path: Click to open
G:\B\Brown, Doug & Levine, John & Mason, Tony\lex & yacc, 2nd Edition.kepub.epub
I think I might write this one off as a "don't change your drivers with the device connected before ejecting as it might lead to metadata issues" but I'm putting this out there in case others have issues.
Also,
for the driver.