Continuity mistake: Quinn finds Natalie and goes over to where she is drinking and conversing with a man seated at a table. Quinn goes over, and in the next shot, she is alone at the table.
Deliberate mistake: Wade and Quinn go to the Top Hat Club. We see a line of people waiting to get in. After they are in the club a while, leave in a taxi, go to the park to meet Rembrandt and Arturo, discuss some things, talk to some passersby, and go back to the Top Hat. We again see a line waiting to get in. It is the same line with the same people in the same place as way earlier. It is a repeated shot of the previous queue from when they went there the first time.
Answer: The show's creator admitted that it was the wrong Arturo.