What happened was regrettable. Since the problem was not reported on time (it was 20 hours after training update), I was not able to react on time. Therefore, games have been played and I had to act on the situation as I found it. At that moment, I thought it was best to rerun training as soon as possible. Now I know better and I agree, I should have given people time to reset their training regime. A lesson for the future.
If your friend had pops on both training runs, he must not have had pops on the same players twice, since players that receive training are marked as such and will not receive it again.
@Wolph: If we disclosed everything about training, the game would lose much of it's appeal. To respond on bug reports, we must have hard proof that there's something wrong, not just feelings. Also, I assure you, training has not been changed for a long time (since the last major update) and therefore it's not different from last season or the one before. We've had issues but they have been dealt with and the problems we're facing now have nothing to do with game shape calculation.
And yes, double downs can happen with level 7 trainer. Also, I don't believe I said anything about trainer level - skill down relationship at all. Please keep on topic.