Fry's ads often do this thing where they put two games in the same rectangle and put only one price under one of the games. Under the other, it says "Guaranteed low price!" I always understood that it meant those two games shared the same price tag.
I hate to play devil's advocate here, but it seems to me they never intended on having it for 29.99. In the San Jose paper, the pricing is located directly under all the games which they refer to, and there's only an "Available by 4pm" on whatever date stamp under KH2, not a price. It sounds like they're covered themselves regardless, they just gave the 29.99 Tuesday only excuse just in case someone came in ready to start a riot if they didn't get it for 29.99.
EDIT: So uh, I checked the Fountain Valley Fry's again, and it's 39.99 this time. I just went ahead and got the game at Gamestop, though. Haven't opened it yet... I'm watching videos of Chain of Memories on Youtube to catch up on the story...
Geeeeeeeeeeez. I wonder if it would be alright just jumping straight into KH2.