last tracked flights not in the coverage map

[TB2PYZ]

Hello everyone,
I'm using raspberry pi 3b+ and flightaware's pro stick plus (blue one) usb dongle for tracking and sharing the data.

On our station page, there is "last 20 tracked flights" area, as you know.  Some flights that i can see in this list, don't appear on my coverage map. 
What would be the reason?
Thank you in advance.
73's

[Runway 31]

Without any other details the normal reason for aircraft on the list not appearing on the map is the aircraft concerned are not ADSB equipped and their positional information is not included in the signals received from the aircraft so cant be displayed

Alan

[TB2PYZ]

Thank you for quick reply and explanation.