Have thorough look at the rationator figures. You wrote yourself that you minimum ratio was 0.55 after you downloaded further you crossed the step where your minimum requested ratio is now 0.6. This ratio step is your problem.
A tip: watch your ratio carefully - especially when you are near the border to the next ratio step in order to avoid such surprises.
To see the Rationator 3.0 steps just click on your ratio below the blue menu bar