There is an inconsistency between the delete key behaviour in the dopesheet vs. Curves view.

Do the following in the Curves view to see the expected result.
Do the following in the Dopesheet view to see the bug.

Create a Cube
Open the AW and create a clip
Move the timeline and translate the Cube on the X axis
(the cube should move horizontally over time)
Go to a frame between the two keys and translate the Cube on Y axis...
new keys are created at current time.
Delete the key you just created...

Curves view = object jumps back to where it should be, given the key no longer exist.

Dopesheet = object stays where it is until the timeline is manually updated... BUG.
The behaviour should be exactly the same as when the Curves view is open.