Yes, these bikes were incorrectly assembled. Department store bike assemblers get paid by the bike (sometimes $3 per bike) so they rush through these spending only about 10-12 minutes per bike. The left pedal is a reverse thread meaning you tighten counterclockwise. Experienced mechanics know this and I am left wondering if there are other serious problems with these bikes in their assembly, such as a tight front axle that you only truly discover when the wheel is off the bike and you try to turn the axle by hand. (It should move freely with no lateral play.) OR brake alignment...Pick the bike up and spin the wheels one at a time. They should not touch the brake pads on either side. Or if they put grease on the seat post. Or...