Shopkeeper 100 lvl charisma

When I have 900g and 2 free item slots and I want to quickly buy daggers, i click on one dagger 3x or more quickly, then I lose 900g and buy 2 daggers. Of course I can resell it and buy again, slowly. But I the whole point was that I wanted to do it quickly, to not waste time xd Pls fix it.