Guild Wars 2

Hello,
When i want to see all the offers for an item in the trading post, it shows me only the~200 first, but i know there is way more of it in the market( for example: charged core supply 1413, supply shown: 177).

Is this a bug or is it so that market manipulators have a harder time manipulating?

Question has been asked a lot but no answer for ANet. And I think it’s the bottom 20 sale prices and the number given on that screen is the total number of items found at those bottom 20 prices.