Navigation Issues

I have two separate windows open and each time I navigate to certain folders(groups) they seem to open in the other window.

This is really confusing and disturbs my workflow. Anyone has a suggestion?

Thanks

How do you exactly navigate to the groups?

By clicking the group name in the sidebar.

Could you upload a screencast of the behavior and post a link to it?

Are these groups favorites? Do you single- or double-click on them?