I remember reading about this here before and it really does work! I wanted a TH ROL package for my party of 5 but was only able to book regular TH. One day a Tiffins ROL miraculously popped up so I booked it at a different time from TH so I could keep both ADRs. I called Disney to ask if they could add the ROL to my TH adr and cancel Tiffins. The CM said no. So I waited until a little after midnight (I can be a night owl and stayed up watching a good movie!). There were no ROL packages available but there was a regular TH adr. I cancelled my Tiffins ROL adr and quickly searched for a TH one. Sure enough the TH ROL package was there! I booked it no problem!