Sorry i couldn't update earlier and thanks for the reply Steven
" YOU HAVE DONE A GREAT JOB"
Yes, under grouping, if i enable "files for each album are organized in their own folder" the first issue appears, I'm not sure why, because tracks are saved in this way on my PC, anyway, i have selected the 2nd option "the following fields define an album" and this issue is solved.
But the 2nd issue where Artist Album shows Artwork from the 1st track " i have tested on 2 PCs and 2 different libraries with default settings" still the same. not sure if i have missed something in settings.