The final ranking is based on the number of players involved in the tie, not the number of points they scored.
Take this as an example tournament: http://chess-results.com/tnr291933.aspx?lan=1&art=1&rd=6&wi=821
Yang-Turner won the playoff, so is ranked 1. Shearsby and Harkanyi finished 2nd=, because they lost the playoff, but scored 5 points.
The people on 4.5 points finished 4th= despite being in the 2nd highest scoregroup, because there are three players above them. If this were Formula One qualifying, and three drivers all had the same qualifying time, the next fastest driver wouldn't be 2nd, they'd be 4th.
It is also possible you have misunderstood the columns. Looking at the tournament table above, let me explain the columns:-
(1) Rk | This is their final ranking.
(2) SNo. | This is their initial seeding, which is determined by (a) Grade (b) Whether or not they're a Supremo (c) Alphabetical order
(4) Rating | This is their ECF Rapidplay grade, where they have them.
(5) Club/City | The Megafinal they qualified from, with some modifications where the Megafinal name was too long to fit in that field!
(6) Pts. | The number of points they scored.
The relevant column for qualification to the Terafinal is the first column.