Something like this happened to me too. Now, three weeks ago i trained stamina in the ASG week, for the next week I'm pretty sure to have changed the training in JS. Last friday my players have been trained in stamina for the second week in a row. Ok, maybe I missed to change, I thought.
During this week I have been more careful, I checked my training a few times, an I'm sure it was changed in JS. Today my players received another stamina training (damn!).
Ok, if is not possible to go back to recalculate the training I don't want to risk to train stamina for the rest of my life, there's something to do with it? There are some way to check if has been a bug, a not overwritten data in the database.. don't know..