Problem:

You want to quickly capture and analyze requirements for agile development however misunderstandings happen frequently among your team members.

Suggestion:

1. Define and get agreement about terminologies (terms).
2. Decompose a user story into end-to-end workflow with screenshots or mock-ups.
3. Define test scenarios for a user story.
4. Use a tool such as Confluence pages for documenting and clarifying user story.
5. If the problem still persists then try elaborating a user story to a use case, and/or a flow chart, and/or a domain model, and/or mind map, and/or a sequence diagram.