My highest rating in the last 30 days is 1280. But I couldn't enlist in the delta banded 1200 - 1399 tournament. I could however enlist in the banded 1000 - 1199 tournament as my current ranking is 1117 ...

I think this is a little bug? Don't mind me being rather in the banded 1000 - 1199 tour as it comes closer to my real level of play. Nevertheless it shouldn't be possible.

NicolaiS