To start, the “Conflict” error message you saw usually means that a device with the same DevEUI has been added to an account already. We only allow each devEUI to be associated with one Cayenne account. If that was not the case, this could have been a bug on our end, which we will look into ASAP.
If you are only seeing RSSI and SNR values, this means that the payload is not being sent as expected. Can you please inform me of the mBed library and code that you used to configure the LoRMote? In addition, make sure that you are selecting the correct device from the device list, as the payload format for the LoRaMote EU is different than the LoRaMote NA.