1. Change the duration to more than 0. 0 is permanent.
2. Polar Offset is an offset according to the point, sometimes a unit (0 degrees would be in front, I believe), whereas normal offset is offset that will not be changed according to the facing of the point...
no, for polar projection, 0 is east side (90 north, 180 west, and 270 is south). To get polar projection in front of unit, use facing unit as a degree.