My trip overlaps the Spring and Summer Dates

[bweagle]

Checking in June 10th.....Checking Out June 22nd. Currently I am booked under the spring deal (but only our first few days qualify for the deal). If I rebook with the new summer code, will they be able to apply it from the 13th through the 22nd even though our check-in day is before the deal begins? I know I would have to lose the "spring discount" on the earlier days, but since there are more days that fall into the summer discount dates, it seems to me that it would be a better deal if I could do it.