I’m at level 8206 and it keeps ..

I have also completed over 7838 levels and although the puzzles often do repeat themselves which is quite obvious at times and may be boring at times. There is an upside to it. The obvious advantage of the repeating puzzles is that during Tourneys it makes it that much easier to score points. The program developers could indeed make the game much more challenging but it would definitely make those players at a more advanced level at a considerable disadvantage.