A big Thank You to the support folks at King.com for investigating and fixing this issue. As of yesterday afternoon, I am once again able to move on with my game!!
I am having the same issue. Just started yesterday. I played from 7906 through 7911 (even completing a level), and when I came back to play again later was back at 7906. Since then it doesn't matter how many items I complete, when I come back I am back at 7906.