Sub Task Creates New Row on Scrum Board

[Rosey]

When we add a sub task to a user story it moves the user story up to its own row on the board.  How can we stop this from happening?

[Ben Zwolinski]

Configuring the swimlanes to be based on something other than "Story" would accomplish this.  https://confluence.atlassian.com/agile/jira-agile-user-s-guide/configuring-a-board/configuring-swimlanes

You could also make a quickfilter to supress all subtasks, which (I'm sort of guessing) would have a similar effect.