Hi all
Hope I'm posting correctly!
I've just upgraded my calibre version, now running 5.10.0 (portable). Been a little while since I've upgraded so not sure which release brought in this change.
In the Tag Browser under Authors, some letters and symbols are now being grouped together. I really don't want them to be

I've just spent a few hours searching the web and trying to play with Calibre to find out how to reverse this, no luck, just frustration.
Is there a way to stop these grouping together? eg lists N and O separately, not all in one N-O as now shown.
Any help appreciated, many thanks