Move your tabs around, and split to a new pane if there'r no panes in that direction.
When you move from a single tab pane, that pane will be removed.
Can move up, down, left, right.
Can't split if the tab is the only tab in a pane.
alt + ctrl + left
alt + ctrl + right
alt + ctrl + up
alt + ctrl + down
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.