During the pre-shift meeting, the employees are sitting in front of name brand tanks of helium. In the next scene in Amy's office, Dina says they don't have any helium for her going away balloons.
When Jonah is telling Amy that he's not moving to California, his arms go from crossed to down by his sides between shots.
The colored flashes that illuminate the cast and parking lot area do not sync up with the fireworks seen in the sky.
Dina tells Amy that she has had no luck finding another best friend at the store and may "have to resort to the night shift." Cloud 9 has no night shift. Multiple episodes have involved the employees being stuck in the store overnight, something that would not be a worry if there was a regular night shift crew.
After telling Amy that he is not moving to California with her, Jonah heads back out to the sales floor but leaves his face mask in the back room.