In the scene where Lola is first riding her bike to school she is going down the street. She looks up, but is till going straight down the street yet she crashes into a tree beyond the sidewalk.
When the family is at the dinner table, one of the twins is sitting across from her twin, with Lola at the head of the table. In the next shot one twin is missing, and the mother is in the spot where the twin was. In the next shot the mother has walked away from the table and twin one is back in her seat.
Toward the movie's ending when Lola is in her first costume as Eliza and is talking to her mother before going on stage her cartilage earring disappears and reappears between shots.
In the scene where the girls are running through the hallway, Lola knocks the stack of videotapes behind her as clearly seen in the following shot. However, in the next shot, there are tapes ahead of her and she trips on one.
Lola's necklace changes position through the whole movie. From being high to her neck to going down to her chest.
Lola says she took to two trains a bus to get to school in New York and it cost $1.50. Given the implied distance she traveled she would have been issued a full ride Metrocard for this journey by DoE for travel beyond 1.5 miles.
The gear shift is obviously in the "park" position as the family leaves New York for the suburbs.
Set in New York City, yet the concert theatre the band plays at clearly says "Elgin Theatre" which is in Toronto where the movie was shot.
In negotiating the terms of the concert visit Lola says "Ella's parents will pick us up at Grand Central Station".
A train from New Jersey to Manhattan would arrive at Penn Station. Grand Central handles trains from the north (Hudson valley and Connecticut).
While in jail, Ella states they are 1,000 miles away from home. In actuality, the farthest point in New Jersey is under 150 miles from Manhattan.
When Lola and Ella go to buy Sid Arthur tickets at the mall and they are sold out, the dates of other concerts are written in Canadian and international format (day/month) instead of American format (month/day). Though the mall would have been in New Jersey, the scene was actually shot in Ontario.