I'm looking into effort and time tracking and have a few questions about efforts,

1) What is the difference between C-c C-x C-e and C-c C-x e?

When I set an effort while clocked in, C-c C-x C-e asks for an effort and formats it in a format I understand such as 00:30 or 1d. When not clocked in, I have to use C-c C-x e (no CTRL for the last one) and it doesn't seem to parse my entry for a timestamp or convert from 8h to 1d. For example, I can enter an effort of "aoeu" and it accepts that.

2) When clocked in and using C-c C-x C-e, the conversion seems buggy:

I enter -> converted to

1d -> 08:00

2d -> 16:00

3d -> 1d 00:00

4d -> 1d 08:00

7d -> 2d 08:00

1w -> 1d 16:00

I get that 1 day is 8 hours, and 2d 8h == 1d 16h, but I'm still confused why 2d is 16h and 3d is 1d.

Thanks,

   -k.