Yep; Guilty as charged: I assumed that unlearning would at least regain me some training points.
I know: NEVER assume....
Still; It'd be a miniscule effort to add a line like "NO refund of training points!" to the unlearn-panel. That would've saved me from a slave being behind on its level AND a bunch of paid-for trophies.

As it is now, it looks like a cheap trick to swindle n00bs out of their cash and I don't think that's the intention....