To my knowledge they never change for the jockeys.

I used them for nearly 8 years up till around 2010.

Never once did i see any column change once they were up.
The only thing that did change was the order of there ranking.
As individual horses became scratchings during the day.

Haven't looked today i set all the neurals to=0 as Star,
Said when he did it he still had ratings showing.

I tested 20 races after hitting ("set preference scale= 0".)
And everything came out as =0 as it should.

Unless they have altered recently everything appears as it should.

Maybe i am doing something different to others?.

Cheers.