When David drinks out of the Kahlua bottle, you can clearly see that it is empty.
When Milly asks Vernon about the milk, she wears her jacket over both shoulders, but in the next cut, her left shoulder is visible, then the jacket is over it again.
Max' birthday is December 4th,
Millie's birthday is May 23rd.
On the bill, Vernon's address is listed as follows:
Mr Vernon Heath
"Teenage Kicks" by Busted (Opening theme)