Listing stacked decks wrong price

Hi,

When ever i list stacked decks the trade website puts them at wrong price or im doing something wrong?? This only happens with stacked decks no other item.

Say i have 50 decks i list it for 1.3 chaos per and it shows as 1.5 chaos per deck on trade.

if i put the price to 1.2 it shows at 1:1 on the trade site.

Any number after 1.2 and it shows as 1.5, so if i say 1.23 chaos per deck the trade site lists them for 1.5 surely this has to be bugged?