question regarding SureTarget 2 plugin

Hi,
I have a question regarding SureTarget 2 plugin.
First of all, it's a great plugin! so simple! saves me alot of time!
So, Andrew, Thank you so much for that...!

I'm using the plugin to animate videos of people talking. Every few seconds the video moves away, while other video shows up.

Now, I want to keyframe the Wiggle feature of the plugin, so for the
video which is now shown, it hovers in the 3d space, and after a few
seconds it stays still (just freeze while the guy keeps talking).

I used the wiggle data Andrew showed in his video, but when I keyframed it back to zero after a few seconds, the video becomes very jerky untill it freezes. I want it to go smoothly, from hover till total freeze.

Does anybody knows how to do it right?
Thanks,
Roy.