seems like life lists are relatively flaky. in this particular case, the duplication on the calendar first list probably comes from a duplication in your life list itself (https://www.inaturalist.org/lists/1174103-alexis_orions-Life-List?iconic_taxon=47115). you could try reloading the life list (see https://forum.inaturalist.org/t/species-doesnt-show-up-on-life-list/1401) to see if that fixes things, or else you could probably just ignore the problem.
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