Join Date: May 2010
Location: PHL
Programs: AA EXP, UA *S, Hilton Diamond, Marriott Titanium, Hyatt Exp, IHG Plat, National EE, Sixt Plat
Posts: 654
This is normal IME. I haven't kept tabs on exactly when the reservation dis/re-appears, but I've definitely noticed this behavior. They've always reappeared under Past Stays within (I think) about 2 days or so.