Jane claims to be familiar with paddling a canoe yet she sits in the wrong end when she begins to paddle it away while stealing it.
Several closeups of the money ball clearly show that all the bills in it are dollar bills.
A crew member is visible in a car bumper at the start of the garage sale scene.
When the women are describing their plan, it involves canoeing south on the river to the mall, however when they are executing the plan at night, the sunset indicates that the canoe is actually being paddled north on the river.