Animation Keyframe



So I’m having a little issue with the animation keyframing.

I’m trying to copy the keyframe of a single handler to duplicate it in the opposite leg or arm (using the timeslider not the Graph Editor) but it copies all the keyframes set in all the handlers (both legs, arms, neck, etc…) so I’m copying the whole pose which is certainly not what I’m intending.

I’m almost 100% positive it can be done that way (hell, I’d swear I’ve done it before and I’ve seen be done by my ex-teacher)

Question is: what am I doing wrong?

Thank you!