I was able to solve all eight clues, but I didn't do so in ascending order.
When I got stuck on one, I just moved on to the next one.
So I solved them out of order.
When I solved clue 7, clue 8--which had been locked previously--became available for me to solve.
I solved it, but clue 8 remained in an "unsolved" state (the easter egg didn't open).
A few minutes later, clue 7 disappeared.
As in, now I can see clues 1-6 all in a "solved" state (easter egg opened with associated game demo/app/trailer displayed);
clue 7 is a blank white tile, where previously it showed a "solved" egg and clue 8 in an "unsolved" state.
When I delete the associated game demo/app/trailer for clue 7 from my xbox 360's hard drive, shut down my xbox and start it up again, clue 7 reappears in an "unsolved" state; but if I re-download the game demo/app/trailer associated with clue 7 again, it becomes a white tile again.
Is this happening to anyone else?
Did this happen because I didn't solve them in order?