if you edit with team editor this is over written by Tweaker settings. to edit with tweaker you adjust the positions with a file connected to it.
eg
[TYRE_POSITIONS_CAR01]
VALUE01 = 0.7450, -0.2384,1.1173
VALUE02 = -0.7450, -0.2384,1.1173
VALUE03 = 0.7025, -0.2384, -1.8691
VALUE04 = -0.7025...