I've had trouble with the Aeotec MS6's acting as repeaters. I know in battery mode they should not do this. You didn't pair any of those as usb powered at first did you?
One old trick to get the usb powered MS6 to stop repeating was to exclude the device, put in a battery, include the device again and then put it back on power. Apparently the config for USB vs BATTERY didn't change after include. Not sure if this is true with the latest MS6 firmware though.
