It's true, the responsibility lies with the seller. It is a risk to list low, after all.
We try to avoid occurrences like this but they still happen, sadly. I'm not alone but when it comes to very complex issues like what we had yesterday, it's basically only my job to fix them. I gave my email here in the bugs forum to make sure users can contact me when such bugs occur, and they have (thank you guys!), sadly it was already 24 hours late at that moment.
We will recalculate player transfer salaries as if the economy updates ran on time (or at least their usual time), so no worries about that.