Good Morning, I have run into this problem a couple times. I posted a trade offer, decided to change the price twice, and this caused what I assume is a glitch. All my money disappeared and I was no longer able to post the amount of the resource I wished. To be more specific, I had like 9k food, I decided to sell about 3.5 or 4k at a certain price, changed my mind on the price, posted again, changed my mind again (this all happened in the span of a couple minutes by the way) and reposted but then I was only able to post about 200 because (I think) the system seemed to think I didn't have the resources to offer anymore even though the 9 or so thousand was still depicted on my resources tab. Have no idea why i money disappeared though. This happened twice in a day and really screwed me over.

I'm aware there is a trade fee, but am I supposed to get charged that fee even if i don't execute a trade?

so the Rothschild's own the market then I guess.