That's not how it works. You are wrong

That trade spot is most likely held by a hundreds of other minnow traders.

For example, Max opens a buy trade at 0.0012000 BTC for 5 QTUM
Phil and John also opens a trade for the same price with 20 and 30 QTUM respectively.

So, the total trade for that position which is 0.0012000 becomes 5+20+30=55

Hence you see a trade like this, Bid 0.0012000, Total =55 x 0.0012000, Size 55 , and SUM Trade1 Toal + Trade2=Trade3 value total and for the third postition it would look like Sum Trade 3 value+ Trade4