Usually you get the value rate for your whole trip if it's value season on the day you check in. I believe July 4th is on a Sunday this year. That may have something to do with it.
You are right!! For the last several years the value season's begun on July 4th, but this year they changed it to the 5th. I think they are getting wise to amount of people there over the holiday, and they moved the date.
MAGICinMYHEART,
Those dates are for the deluxes only. The moderates and values have their own set of dates.