Ok, Thanks CFT. for your answer, it's a suprising answer, since i assumed it was something 'i needed to fix using the settings in some way'... so the fact that there may be 'nothing to do'is 'very interesting'

Thankyou for the Explanation, it's been something that's been 'bugging' me in the background for quite some time, so it's good to final 'put the issue to bed' xx