You want to make sure to bring the aircraft back to home base so it shows up on the calendar correctly.
The easiest way is to go to the Calendar and go back in time by clicking the back button on the date section (Top Left Corner)

Once you find the trip you need to bring back to home base, go ahead and click on it and go to the Overview of the trip.

Once on the trip, make sure to click Edit Itinerary

Add a leg bringing the aircraft back to home base as that will clear the calendar and fix the location.

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