Training Bug/Feature

Not sure if this is a bug or a feature, but I discovered to my cost that whereas canceling the construction of a building gets you a refund of the building cost, cancelling the retraining of a unit does not.

I just had my British Army in America go through a second major battle with the Cherokee before it had replaced all its casualties from the first and as fresh units were involved in the second battle I figured to just click the retrain button, and then retrain all the units from scratch.

The problem was the first retrain had cost something like 2,000 to set-up and I never got a penny back so I had to pay for their retraining twice.