Reproduction case :
Clic on an item on Item Broker --> you see that "Seller A" is selling it
Clic on another item that another seller (lets say "Seller B") is selling TWICE, so his name appears twice on the results list
Clic back on the previous item --> you now see "Seller A" AND "Seller B" on the results list
It might be a bug where Results list is not refreshed properly because only one index of "Seller B" has been removed from results list
