Animation Keyframes Not Triggering?

Hopefully I can explain this clearly... I have a character with animation keyframes. I have a horizontal slider attached to the time of the animation. This means that I can drag the horizontal slider forwards/backwards (from 0 to the length of the animation) and see the animation play (when I set the timeScale = 0).

Here is the problem...I have a button that will go to a specific time of the animation when clicked. This works fine when the time of the is AFTER the current frame. HOWEVER, if the animation time is set to time BEFORE the current time of the animation it appears that all the animation keyframes are NOT triggered. Some seem to be missed... I can scrub the slider back to the beginning and then forward and it will play the animation properly.

I have tried setting the horizontal slider to 0, and then moving to the value that I want, but that doesn't seem to help. It seems that it is processing it differently when I manually change the time sequentially, but any large jumps back in time seem to break it.

Is there a way that I can ensure that all the keyframes are triggered?

I'm hoping that I'm just missing something simple here...