Yes, it seems that the wiring diagrams on most of the SONOFF selling pages are wrong! EDIT: incomplete.
See this video :
From the last logs you provided I see no difference in the DetachedRelay mode...
Update: when you re-wire your ZBMINIR2 to use S1 and S2 for the external switch, please send me the debug logs in both cases - when the DetachRelay mode is disabled (default) and when is enabled. The Enable command works OK for the DetachRelay parameter in the latest driver version.
