I feel like this is giving away a huge secret or something, but........... I start at Level 1.
I have trouble getting the straight piece to the edge fast enough when the pile gets high too. It's not very smooth and it's tough to figure out where to turn it.
But I don't have the overhang proble, because I don't create overhangs.
OK, I suppose I do, but rather than try to fill them in (depending), I usually attack them by clearing the lines above them. Give that a shot.