In the episode "Landslide," Mohinder says that his sister died a few months before he was born. But in this episode, when he first learns of her, he is told she died when he was two years old.
When the customer shows Charlie his crossword and asks for help, we can see that he has somehow filled in the last six letters of the answer for 29 across (kumari of Kanyakumari) without having filled in most of those down answers.
Bennet arrives at the paper factory which is the cover for his real work, stops outside a security locked door, lays his briefcase on the cabinet next to the door, opens it and takes out a security card. He uses the card to open the door while leaving his briefcase lying right there open. In the next shot, he walks out through the door, and the briefcase is left lying right where he put it, instead of taking it with him.