Overall score 64 in slot 1 expected percentile ?

75 is too low. It would be around 85 or so

Why in the Cracku's top 20 CAT scores there is no one from SLOT 2?

Personal Opinion - The same observation is what is giving me hope (I took my CAT in slot 2, and got screwed by LRDI). I feel that Slot 2 was difficult compared to Slot 1 and Slot 3(even though students of Slot 3 were taken aback by the difficulty level as well, the data says otherwise). Hope Slot 2 normalisation increases my score of 80 to 87/88.