I set up a manoevre to get an intercept with Duna.
The Dv required was 1082. The Dv available from my engines was 4117 (see diag1)
As I burned, the time required for the burn kept increasing, and by the time I had used 1082 Dv from my fuel Dv available for engines was 3056 (diag2),
so I was 21 Dv over. The time to burn says 00 but the yellow line in the burn timer shows there is still time left to burn. I had overshot by 21 Dv, but hadn't gained an intercept.
Anyone any idea what's going on? What am I doing wrong?