Double echo

Hi I used SafeSky for the first time the other day and was pleased with its performance. However as I was approaching my destination I noticed traffic heading in my direction that has the apperance of possibley two aircraft flying in close formation.
(Oh, apparently as a ‘new user’ I can’t upload an image).
As there was only one aircraft, I was interested to know if was transmitting more than one signal, which then looks as two close targets.

A likely reason for the double echo is that the aircraft was transmitting on ADSB and SafeSky. This can be avoided by putting the aircraft’s hexadecimal code in the SafeSky information.