Trade not able to sort items by price

I noticed when i sort by price, it's not working properly. I purposely posted items for less than everyone else, but still won't put at the top of the list. I noticed this isn't the case only for my account but people who are posting things for 3ex are ahead of the list over people who are selling for much less. I tried re-posting, and sorting by price. doesn't seem to help anything atm