Why do tasks with subtasks span multiple columns for certain people

[Don Simpson]

This question is in reference to Atlassian Documentation: Monitoring work in a Kanban project

Why do tasks with subtasks span multiple columns for certain people. I have co-workers with tasks on a kanban board that span Development, In progress and done. I have others with the same type of tasks that do not span multiple columns. Not clear to me why this happens.

[Nic Brough -Adaptavist-]

I suspect it's because the subtasks are in different status, and those status are in different columns.

[Paz]

That sounds right to me as well. 

But not easy to tell without knowing the configuration of the board and the status of the subtasks.