Cards in Mushroom, used horizontal stack but i got 3 collums

I got severe cards and it was ment to be just 1 card (1 ONE collum

But after de second Card (i started with horizontal stack) the 4th card went to the right (second collum) and the 5th card went to the 3th collum. That is not estetic, i want all the cards just in one collum

See printscreen: