This time was very interesting. I consulted this site as usual, before going to site using link. When I looked at PRICELINE EXPRESS first. There were 3 hotels listed in my target area (PM/Conc). 3.5 star for $59, 2 star for $49 and 3 star for $101. From this site, I knew 3.5 star was Marriott West, which I didn't want due to location and paying for parking.
Since this is family trip, I was on phone with my sister and she saw totally different options! maybe since she's staying one extra night? So I logged out and searched again and saw same options as before. Sister brought deal for 3 stars for $49 for 3 nights 8/6 to 8/9 and got DoubleTree. She searched again for my dates and got 3 star option for $51 with same options as hotel she just booked. Since I couldn't see deal, she booked deal for me, which turned out to be the Doubletree also, just $2 more per night, Overall, I'm happy though wondering how PRICELINE EXPRESS deals are shown since 2 different people at different locations, saw different options at same time.