Thanks for everyone’s help! I was able to add a day today. When the calendar showed up it only went to the 13th. When I clicked on the 5th as my check in date (which I didn’t do yesterday because I was so confused by the end date), then the 14th showed up as a check out date. No wonder I was confused yesterday!
And to answer the question about why I add on day by day, I’m OCD that way. Haha! In all seriousness, I do that because someone starting a new reservation today could book the 7th-14th. If I was trying to get a room that goes fast like a AKV value room I might miss out on it if I didn’t go in each day to add the room.