Link?
Just look at the website. when you select flights, it shows that you get two suitcases in economy.
Quick work with the DDMS post
I'm quite positive that it's a mistake, and if someone's planning on relying on this, I suggest bringing along some sort of documentation about the 2 bags. If you go to the section of the baggage policy on their website, there is no mention of such a thing (only PE). In Sabre it also shows 1 bag:
BAG ALLOWANCE -TLVJFK-01P/AZ/EACH PIECE UP TO 50 POUNDS/23
KILOGRAMS AND UP TO 62 LINEAR INCHES/158 LINEAR CENTIMETERS
2NDCHECKED BAG FEE-TLVJFK-*/AZ
*BAGGAGE ALLOWANCES/FEES UNKNOWN - CONTACT AZ
BAG ALLOWANCE -JFKTLV-01P/AZ/EACH PIECE UP TO 50 POUNDS/23
KILOGRAMS AND UP TO 62 LINEAR INCHES/158 LINEAR CENTIMETERS
2NDCHECKED BAG FEE-JFKTLV-*/AZ