I am scheduled to fly tomorrow ATL-JFK on a 757. Delta however thinks it's funny and keeps switching the seating configuration (first time in my many years of flying with them). I was originally in a window seat from the booking to last night (between booking and last night there were two configuration changes, I kept my window seats), last night they switched the configuration again and I ended up in a middle (preferred) seat. I switched again to a window. This morning I go to check in, and they switched the configuration AGAIN, and now I am in a middle seat in front of the emergency exit row that doesn't recline. Am I just complaining for the sake of complaining, or is there anything I can do to at least get an aisle seat?