Why do the Mannings sound like they have a Different accent ??

However there is and always has been a certain animosity/indifference between people from Uptown people and Downtown people. It goes back to the days of when New Orleans was taken over by the U.S.

Very true...that is how the term "neutral ground" came about...the older, "Creole" section - the French Quarter and areas downriver were on one side of Canal, the newer "American" section was on the other, and the "neutral" area met in the middle of Canal.

My dad, who was from Uptown, said that my grandfather, who had his engineering office downtown, never went into the Quarter, except to go to lunch at Galatoire's.

My dad didn't have much of an accent, but part of that might have been due to the fact that he left New Orleans right after college, and didn't return for many years, when his office relocated to the Mississippi Gulf Coast. What's funny is that my mom's Canadian; we ended up in her hometown for Katrina (had to leave the kids there for a while, while I went to work in B.R.)...it had been years since I had been up there...some of my relatives said "you don't have much of an accent, eh?"...I guess they were expecting a twang or something; in the meantime, they all sound like Bob and Doug MacKenzie.