[GeoffR]

In earlier firmware versions (up to 3.19.5761, maybe some of the early 4.x.x versions?) the ampersand '&' ligature and the word 'and' were used to separate multiple authors' names, so a comma could be used to write the individual name in "Last, First" format without problems.

But then later they changed the multiple name separator to comma, and so now the "Last, First" format doesn't work properly.

I think the Authors tab was added about the same time they changed the name separator to comma or shortly after, so I don't think there is any firmware version where the Authors tab works properly with names in "Last, First" format.

So in short you can downgrade to an earlier firmware (without the Authors tab) and use names in either "First Last" or "Last, First" format, but if you want to run the current firmware then you have to either use the "First Last" format or else live with the problems caused by the comma being treated as a name separator.


Edit: Some examples might make it clearer what I mean:

In earlier firmware versions all of these author name formats were supported:
* Joe Bloggs and Jane Smith
* Joe Bloggs & Jane Smith
* Joe Bloggs, Jane Smith
* Bloggs, Joe and Smith, Jane
* Bloggs, Joe & Smith, Jane

But in later firmware versions only one format is supported:
* Joe Bloggs, Jane Smith