When using the APDL toolkit on safari, which by the way is great, it throws two or sometimes three entries in my calendar for the same flight. Does not happen when I use the web based schedule importer. Is it me,or a glitch.
Do you have APDL on two devices (iPhone and iPad) and have calendar sync turned ON for both of those devices? That would do it and is not recommended.
We did have some calendar duplicates issues a while back but if you're using the latest beta that shouldn't be an issue anymore (I think/hope).
Do you get duplicates if you create a manual entry without importing?