[BRX]

If you import from a csv, MS Pro won't know that you already have a song that is the same as the one in the csv. The titles may match, but that by itself is not enough to uniquely identify a song.  The existing song will not be updated - a new song will be created. The import feature cannot be used to update existing entries in the library at the moment. If you import from a csv, select some songs, and later import the same csv and select different songs, they will all reuse the same file and recognize that nothing needs to be done as far as copying the file to the storage location.

Valuably information. Thanks. I assumed so and expect it will be in the updated manual, but better to verify now.
I didn't expect the title alone to be the identifier but at least the title and the PDF source. As I understand if I import a csv again with same title and same pdf source a new song will be created for now, correct?

If people want me to add a feature where csv files can be used to update metadata of existing songs, I can certainly look into doing that.

You have my vote for an update feature in this case (same title/same source). I think it's too much to have an "intelligent" update feature with comparing fields. It should be sufficient if the old metadata is overwritten with the data of the update cvs.

As far as "double entries", if you mean multiple values in one column, just delimit them with a | character. MobileSheetsPro accepts almost any delimiter now for columns (other than | ). It's automatically detected. Use tabs if you want and it should work. The only requirement is that the | must be used to delimit multiple values in one column.

No, I was asking how MSP handles duplicate entries. Case in point: I differ between lyricist and composers while MSP only has one metadata field for composer. So for a cvs I have to join those fields and sometimes the lyricist is also composer or cocomposer. I wanted to know if it's a problem for MSP if I don't edit the duplicates manualley and there's a name twice and if it only creates one entry.