In "Buried" when Sarah is struggling with the agent after her father's death we see clearly a key slide across the floor; in "Dead Fall" when she examines the key, it is not even close to the same size or configuration of the one in "Buried".
After digging up D.B. Cooper's money, they place the $5 Million (which appears to be made up in $100 Bills) into a bag and can be stuffed into a locker and easily carried by a single person with one hand. Each $100 bill weighs 0.98 grams. 50,000 $100 bills ($5M) would weigh 49,000 grams (108 lbs!)
The supposed town of Kingman, Arizona is revealed to be Mineral Springs, Texas (a sign is visible when Linc is on the rooftop watching the panhandler beat up LJ). This is a small town a few miles west of Fort Worth. Season Two was filmed in and around the Dallas-Fort Worth metropolitan area.
When Michael hands Sucre the note saying ''bolshoi booze'', the b's are capital ''Bolshoi Booze''. In Michael's tattoo the b's are small ''bolshoi booze''. Capital B would make an eight rather than nine (small b), so Sucre's coordinates would be a little different.