Why aren't animations created from control rig exact?

I tested out control rig today for use authoring hand gripping animations for VR.

Only set up a basic rig atm but control rig seems super cool. However, when I came to create animation sequences from my rig I found they weren’t one to one with what the rig was like when I created them. Is this expected?

First image is the control rig after positioning. The second is the animation sequence after being generated (ignore the control rig gizmos)