Continuity mistake: When Jack and Zack look through the window into Luigi's Tin Top there is an empty table between the dinner table and the window. In the following shot inside the house the empty table and chairs are in a different place, closer to the wall. In the next morning they are in the original position again.
Continuity mistake: When the three protagonists come to the hut in the swamps, Bob's shirt is first tucked in in the back and hanging loose in front. When they step up the porch it is tucked in in front and loose in the back. Finally, when they enter the house, it's again tucked in in the back and loose in the front.