Not that I'm aware of. I flew back a few days after Purim with 1 backpack, a laptop bag, and a carrier bag - all of which went through without any problem. Admittedly I have status, but I know many people without status who have no problems with doing similar things.

The charge might have been due to the carry-on being checked in under 'overweight' - standard charges are $30.00 per kilo, which would make the carry-on be around 8kg or so

PS. If it was the 'midnight' flight, then it was the LY001