Visible crew/equipment: After Fiona is hooking up with a guy from Tinder, as she is putting her clothes on and the camera is on the guy, you can see the guy recording in the mirror. (00:06:57)
Continuity mistake: When Frank and Liam are sitting at the bar in the Alibi, Frank orders 2 cokes. When Lip changes his mind about drinking a beer, he gets up to talk to Liam. The camera shows 2 cokes sitting on the bar. When the camera changes angles the cokes are gone. The camera changes back to the same angle and Veronica is handing them the cokes.
Deliberate mistake: When Dominique is creating a Tinder profile for Fiona (an app Fiona admits she doesn't use), she manages to use Fiona's phone to take a picture of her, create a profile, and quickly get three matches, all within a span of 25 seconds. Downloading the app itself would take longer than 25 seconds, much less agreeing to its terms of service, and verifying the email or phone number associated with the account. (00:45:15 - 00:45:39)
