Melfi's Office is reversed. In earlier seasons when Melfi left her office the couch would be to her left. When the group leaves her office in this episode, the couch is now to the right.
Even though Paulie claims all dinosaurs are meat eaters isn't true, this is only another example of his character's consistent ignorance and arrogance.
When Benny/Little Paulie are guarding the backyard, the weapon they are armed with is a Norinco 84s (.223) AK-47, as evident by the straight magazine. Later when Tony tells Benny he can leave for the night, and he will take over, Tony walks to the table to retrieve the weapon and it is still a Norinco 84s. When he lights up his cigar outside and lifts the weapon, it changes to a Norinco 56s (7.62x39). This is evident by the curve of the magazine.
If Tony Blundetto was indeed Angelo's best buddy while they were in prison, Angelo should've already know Tony Soprano is his cousin.