jit.path questions

Hi

I had a few questions about the jit.path object and hoped someone might know the answers:

1. Is it somehow possible to set the "interpmode" on a per-point basis?
2. Using spline, If I make a path which has two keyframes that use the same values, the resulting movement is not: No movement.
Instead I see a subtle forth-and-back. I understand this is caused by the way the handles are calculated.
So, is there some smart solution other than some (compare all cells and if two successive cells are the same set the handle to 0) thing?

Thanks a bunch!
Grtz.