Cheers for the big-up Andy
You might find that you have gone to hard on the front compared to the back so the car is not rolling consistently front to rear as you enter, travel through and exit the turn. Equally body roll is controlled by more factors than just your suspension setting, but a few of the guys at my local club nearly always soften the rear and stiffen the front to get rid of steering but in reality it doesn't always have the desired effects, making for a twitchy and unstable car that equally doesn't like going through bumps.
In my experience a stiff front can make the car very direct initially as the tire bites straight away, then mid corner as the tire grip is exceeded the front will start to wash out, then the softer rear end will roll too much causing the car to snatch mid corner. But again due to the soft rear end, when you apply power weight will transfer more quickly to rear causing the car to push wide on corner exit. It's probably not too good an explanation but hopefully you get the idea, that it's all about balance.
As said though it would be advantageous to have your full setup so that suggestions can be made as to what to change.