Back when this elders "arrangement" first started..early 70s? Was it ? In the cong my parents attended..(i was far away and married by then)..there was an unholy row.
I never knew the finer details..but i do recall the cong was split into 2 cliques..and they even sat on opposite sides of the center walkway in the meetings.
When it came to recommending those first elders..that was a real feud about it..to the degree that 6 or so got disfellowshipped..and there were no recommendations..apart from one...my dad..and he certainly didnt want it. So a new presiding overseer was "parachuted in" from a neighbouring cong..
This took place in what was then Hockley cong in Birmingham UK..later to be called Winson Green. ( If anyone reading this knows the area )