Not being advanced to next level when I complete and see a banner that says level completed

In the last 24 hours I have completed the level 969 four times. Each time when after it says level completed when the page that comes on that says who you have passed with the word next never shows up. It's interesting that this only happens when I actually complete the level. I've had this problem before on other levels, and get the same response from others that I talk to. The levels that are hard levels and takes a while to pass, it's like it just wants to discourage you from playing.