"In that very season, Stephanie and BJ had a tie-breaker to decide who goes and who stays, well before the F4, it was the fire challenge."

That was a F2 situation for Ulong. Of course the vote doesn't work, you need a challenge. F4 in a tribe cannot be decided by the rock if one has immunity but, when more than 2 voters are tied after a revote, the rock is still in use.

Jonathan said that he didn't want to vote alone at F9 to eliminate Yul's idol because he knew that at F8 the votes would go 4-4 with him facing off against Yul. He also knew that Raro would fold because of the purple rock.

The rock still settles the ties when more than 4 players attend TC.

I don't want to discuss Outback but listen again to my all-time favorite episode: Jerri, Amber, Colby, Mitchell AND Tina were in a five block of votes established on Day 1. They mention it twice in the first 4 episodes. It has been documented in interviews and on the DVD that Tina changed the vote during the walk to TC and was the one to convince Colby to keep Keith.

PS: Lisa wasn't an alliance mate. Scout was ready to let her go home if that was the twist for not being put on one of the tribes. Lisa became part of the alliance only when Scout saw how Eliza, Ami and Leann didn't trust her. Scout wanted disharmony and that was one way to achieve it. With no mix-up, Lisa was next to go anyway. That little scene was shown to help turn Ami into a "Bully".