Hey Stephen! I'm checking your player again. WOW! I LOVE the Overture! Anyway, all 6 are there and they all play. This is a very unique problem! My best guess is that it is somehow an error with the cache on your computer. You could try deleting all the pieces (maybe download them first to make it easier to upload them) then make sure your page displays properly with NO music. Then upload them again in the right order.
Is that not correct? If it IS correct, then that means there is a problem with your PC. Maybe restarting will clear the cache, or maybe you can do it manually. If this image is NOT correct, then we have a bigger problem.