SonOff 433 RF Bridge and iHost

The main issue I have, as been cause when adding more sensors, I renamed some RF433 devices, so that I it would be easyer to identify. I have a mix of RF, WiFi and ZigBee devices.
The problem is that some old name of devices are re-appearing as GHOST in my setting of the 433RF Bridge and I can"t clear them; there is no factory reset button on door switch or P.I.R. detectors.
Question: Owning an iHost with the same scene as my eWelink setting, shoud I clear all of them? I am asking my self if all my problem are comming from duplicated scenes on eWelink App. and the ones on the iHost. I unplugged the iHost to be sure that the problem was on the Internet side, not my LAN.
So, should I depend only on scenes on my IHost, losing my sunrise and sunset hours options scenarios?