I think something really needs to be done about this issue, it is becoming a big task creating a new project and we will soon have to switch to using another tool if this issue isn't resolved. 

Also, the issue seems to have gotten worse, when deleting the dulplicate components, all the test from that component is being added to the original component, meaning that I am having to delete all the components, and then the individual test cases as well. 

Do you know any workaround for the time being other than deleting the duplicate componentd?

This also seems to be happening for other settings ('use solid status backgrounds' for example)

Looks like it may actually be caused by copying a test case and then dragging it to another component.

Or alternatively, some more detailed way to filter test cases when creating a test run other than just those with 'critical' or 'high' priority.