Hi
For the problem described in KB (Sprints shared between multiple boards), I need to find a solution for this problem or evaluate some alternatives to JIRA and/or JIRA Agile. If you have the same problem like us and find some solution for that, please share it with me.
Here are symptoms:
- A sprint shows up in a board in which it wasn't created.
- Making a change to a sprint in one board affects a sprint in another board.
- A sprint shows up in a board after an issue has been moved to it from another board.
- Attempting to close sprint requires admin permissions in another project.
and this is my comment there:
Another problem exist here and I describe it:
1- Consider you have two boards(each for 1 component or subsystem) for 1 project and each board belongs to specific persons without any persons exist in both of them.
2- Consider a bug has been raised and you assign it to a person in an sprint in board 1 wrongly.
3- Now You want to reassign it to another person who belong to another board. If you do this, an sprint auto created in board 2 with the same sprint name at board 1 and you have to do some more stage to avoid this problem
I hope to Atlassian see this as a bug not a feature.
Thanks in advance 
Ansar