If those two matches are first round we can speculate that losers take their places on the bench from center going outward.Phillip v Natalie, Natalie loses.
Steve v Andrea, Steve loses.
Rob v Grant, loser sits to Natalie's left. Pure spec., Rob loses.
Ralph v Ashley, Ralph loses. Knocking out Zaps is all she cares about anyway.
Grant v Ashley, Ashley loses, sits next to Rob.
Phillip v Andrea, Phillip loses, takes spot on end of bench because Ashley took the coveted spot next to Rob.
Grant v Andrea, Grant tries but eventually loses his center of balance, can't recover quickly enough, Andrea wins.
Or it could be Steve loses the first first-round pairing and sets the seating order in motion. Phillip would sit next to Rob if it were his choice where to sit, so the final round may be Rob v Andrea. Rob losing this immunity to her may just move her up in the target order, or she may be at that spot in the target order anyway.