When Timmy and Cindy are sharing a milkshake, the straws appear and disappear between shots.
In the climatic battle, Jimmy turns Crocker back to normal, including his clothes. But when Jorgen (as a schnauzer) is attacking Crocker, Crocker is once again wearing his fairy control suit.
As Jimmy tries to use the Auto-Poofer a second time while standing outside of the Turner house, He is shown to be 20 ft tall.
When Cindy is in Jimmy's lab giving instructions to Timmy, the first time we see her, her mouth does not match what she is saying.
The big wand powers all magic in fairy world, that should include the weapons in the fairy armory.