Trade API returning wrong bulk sale information thus getting wrong buy whispers

I have a premium quad tab configured that items are individually priced. I put in there 2 Corrupted Fortress maps individually setting the price for both at 70C. I also put in this quad premium stash tab a 3rd Fortress map which I set the price for 85C. Now people will keep whispering me that they want to buy my 3 Fortress maps for 210C. That is WRONG. I did not price them as such. They can buy my 2 Corrupted Fortress maps for 140C but all 3 would be 70+70+85 = 225C.

I would challenge this then that this is expected behaviour on two fronts: First I specifically set the price for all 3 items separately. So why does the game decide for me that it overwrites my prices? Secondly, as you are saying the corruption mod isnt considered and this is working as designed. Why? It makes a huge difference regarding the sale of an item. In this case, corrupted T17 maps are sold at around 50-70c-ish while the non corrupted maps are sold at 90c+ but closer to a 100c.

Do you know many whispers I get because people want to buy them cheap? When in reality that is NOT the price I set. It is extremely annoying. Please understand that it is extremely frustrating receiving dozens of whispers each second because they think they are gonna scam me and buy my cheap maps when it is the trade API that is at fault here while I am getting annoyed to oblivion. Is there a workaround for this?