I cannot get columns to share a row no matter how I configure them.

I would like to create some feature cards, 6 in total, divided into two rows of three. When I add a row, the columns are stacked no matter what settings I change. I have added placeholder content in case the lack of content was the issue and that did not resolve it. I have updated the columns to 4+4+4 and reset the column width. I have removed all column gap and padding settings and the columns refuse to share a row horizontally. I am very new to SP Page Builder. Please help.