When Carrie writes her column for "to pee or not to pee". If you read it in a screenshot, it's clear she said word for word what she said to the politician when he was in the shower as if the writers put the script in the column itself. If you keep reading, the column starts to repeat its same sentence 3 times, word for word, making the column seem more detailed about the subject when in fact it's the same sentence just repeated numerous times.
Carrie very pointedly does not give Bill her phone number, and he comments that she is unlisted. Yet when he comes to pick her up for the dinner in Staten Island, he is calling her from his car.