When the gang was incarcerated, they all more than likely had their cell phones stripped from them. How did Sikowitz get them back?
When Tori's shoe flies off her foot and hits the chancellor, by looking closely one can tell that the shoe hits his eye patch and not his working eye.
When everyone goes to the chancellor to try and get Tori out of prison, André has a large lump on his neck because of the bite from the vampire moth. But in the next scene, the lump is gone, and since there is no mention of it from that point on, it might be cured.
Tori's high heel flung off of her foot to the chancellor. However, Tori's heel is clearly seen to have a strap on it, so even if she could kick it off, it probably wouldn't hit far enough to the chancellor.
When Robbie crawls into bed with the girls, he comes up from the bottom. But if you look closely, the blankets appear to be tucked in. Also, Trina and Cat move apart right before Robbie crawls up, even though they were closer before then.
Sikowitz says he will drive the students to the border of Yerba. However, as Yerba is an island, this would be impossible. Unless there was a bridge, but that is doubtful.
In order to call from inside North America to outside of North America, you first have to dial 011 then a country code for the country being called, before dialing the local number. When Festus is giving Tori his brother's number in Yerba, it doesn't start with the required 011.
Tori's mom says that she can have a car but Tori can't drive a car yet.
The gang should have been denied entry into Yerba if it was at war in fact no one should have been allowed to enter the country in it's current condition.
When Tori walks behind Festus's truck, you see her foot stop moving from under the truck while Cat and André talk. When the camera goes on Tori, she keeps walking like she only came around the corner of the truck.