STR:
- open I Clone 8 with a humanoid character
- import any animation clip
- right click the Motion row in the Timeline
- click Reverse in the context menu
- double click the Motion Layer row anywhere in the animation clip

Expected Result: The entire frame double clicked frame should be keyed

Actual Result: The inverse of the double clicked frame will be keyed. i.e. if you double clicked frame 40 of a 100 frame clip, then frame 60 will be keyed.