Observation 3692835: XW-2A (40903)

Regarding Observation 3692835
Hear an odd thing on this XW-2A that I cannot explain - it looks like two but there is actually only one ham usb qso, one at around 10khz and the same qso is around 15khz. I can listen to the raw iq in gqrx and move the usb center back and forth between the two and hear the exact same two guys talking. Weird.