I'm fairly new to the phantom but I've tried this several times and I don't understand what I'm missing.

The web site says you can program a max flight distance of 5000 meters which is roughly 16,400 feet. The error on the screen even says 16400 feet but you can also clearly see I had only programed in a flight of just over 5000 feet. What I've noticed is I have to program a flight of less than 5000 feet or I get the error.

Can someone please shed some light on what I'm doing wrong?

it's a bug of app and we will correct it as soon as possible.