jann1033 -
Been reading through these posts - didn't see if you ever got your question answered about adding/dropping days on res.
Last Jan. I called & got a code (not AP) for March. After about a week, I needed to change the beginning/ending day, called and had no problem, same res. #. Then a couple weeks later, needed to change the whole week to the following week, and CRO told me no problem, as long as the dates changed to are within the original code dates - for instance, if code for 3-01 to 4-26, could not change to 5-01 begin date. Again, I kept the same res. #.
Maybe you already found out, but thought I would try to answer anyway!