I have a EZX (version 01.7E.EA) that sends extra codes after it has been on for a while. Seems to favor send an extra “1” unit code. I’m using the unit as an all house codes receiver until I’m ready to shift to Insteon. I do have a few Insteon devices, but they are in X10 emulation mode for the time being.
I’m using an RR501 in the interrium, which seems to work fine. I don’t have a computer USB Insteon interface at the moment.