On a recent private aircraft flight the track display shows a mix of data from two different flights, on two different days. The track shown in green is the wrong flight/wrong day. The track shown in light blue seems to be correct.
Sorry, I thought this might be a known problem. Look at N9648X. The two flights shown are from Sunday evening and Monday morning.
Were all the flights IFR, or was the most recent one VFR?
Both flights were VFR flight following with no flight plan on file. It seems like the data they enter for these flights is a little haphazard.
I will open a development ticket on this, but in general, the deal has been that VFR isn’t 100% reliable on FlightAware.