Well that was a fast found explanation.
When using Windows Media Connect I get an option to view by Folder. I tend to use this option as each Album on the server is contained within an appropriate Artist folder. This folder list is sorted Alphabetically as you would expect but the sort does not change when you drill down to the track listing.
By selecting the Album view rather than the Folder view it takes longer to find the album you want but all the Tracks are displayed and Played in the correct order.
Sorry to trouble you all, normal service is now resumed