[kbaerwald]

These are two problems:

- if there is a second line with the word "series" in the book metadata (like I had the problem with my #series column) the PB740 takes everything in this line and "declares" it as a series name. This is why I had garbled information in my single titles (no series)

- the second problem (this the one you are referring) has to do with the way how the PB740 identifies series at all. @trekk pointed out elsewhere that this has to with the actual sequence of :calibre lines that follow the dc: lines in the book's metadata. This can be sorted out by rearranging the calibre: lines in a specific order

Quite frankly - currently I do not use the series information of the PB740 at all. It is to tedious to change all these specific lines (any tools for calibre did not prove to be helpful). So when copying the books from calibre to my PB740 I make sure that the metadata plugboards contain such a line ({series}{series_index:0>3s| - | - }{title}) for any device and any format.

Thus I have the series information in my book title and can choose the correct item of a series.

Klaus

P.S. You could use the Sigil epub editor (edit metadata F8) for having a closer look into the metadata world.