I thought it was noticed some time ago, but...
I accidentally clicked twice on "confirm unreserve" button and it took unreserve fee twice.
It probly never happen,well but it seems sometimes it happens.
I use opera, so if i hit back it do not refresh page, and i can check easy if something went wrong*
You have 5.494.589.833 credits.
You spent 67.790.681 credits to retrain the crew and set the fleets on active mode.
You have 5.359.008.471 credits.
Difference is 135.581.362.
Nothing other happened, and 2*67790681=135581362, so bug.
It wasnt big deal, but if somone has some crappy mouse he may end up bankrupting
* ah, i forgot i got logs too, it is in logs.
Now time to use all my counters on alt