In SB-129, when Squidward is in the "Nowhere" place, he has his clarinet. When he starts running around frantically, his clarinet has disappeared. But when he crashes through the ceiling of the time machine, the clarinet is back in his hand.
In SB-129 Squidward goes in to the time machine for the first time, turns the key and pulls down the time machine lever, which takes him back in time.
When he is back in the time machine the second time he fails to turn the key yet the time machine still works..
At the beginning of SB-129, it was said to be Sunday; however, the actual date the episode took place on (March 6, 2017) occurred on a Wednesday.
In SB-129 SpongeBob states that the Krusty Krab is closed on Sundays however when Squidward enters the Krusty Krab the doors are open though it could be likely that Mr. Krabs forgot to lock them.