Something's amiss. Literally when I checked earlier this evening and last week, RJ613 was D9 - thats the reason I chose 4/17. Also confirmed this on the RJ site (flight was bookable in D).
Still comes up as such if I try to book on RJ.com (in fact for either flight):
Fare restrictions
From: Dubai
Operator: Royal Jordanian
Fare code: DLEEAE
Please refer to Royal Jordanian rules for fare code DLEEAE
between Amman - Queen Alia International and Dubai