Question Author
wolf63
/// I'm not very good with computers but is whatever you are playing the CD on perhaps set to play random tracks instead of playing them in order? ///
You've cracked it, after thinking over your suggestion, I got to examine Window Media Player, and at the bottom I noticed 2 crossed curved arrows, which gives one the option of turning shuffle on or off, mine was set at on.
I now have 4 perfectly good discs, all playing the same set of tracks in perfect order.
Thanks everybody for your interest shown.