Adding a key to an Absolute transform section will accumulate an extra transform offset when a transform override is set on a sequence.

The keyed transform value will have the origin offset applied to it when it should not be. 

1. Create a new sequence
2. Add an actor to the sequence at the origin (e.g. drag a cube to make a spannable)
3. Enable override instance data
4. Select an actor not at the origin to be the Transform Origin Actor
5. Add a key to the actor from step 2's transform section

RESULT

The actor will be offset an additional transform origin, rather than remaining where it was. Each additional key will compound this.