This error is probably due to your plotter or PC software.The easyTRX always sends the own position in a NMEA-Sentence, too. It is the sentence “VDO” (own AIS position). The other targets (ships) are sent with the sentence “VDM” to the plotter/PC. We guess that the plotter or PC software you use does not make a difference between VDO and VDM. An update could help here. The easyTRX can not suppress the VDO, because it is mandatory.