After dragging an existing sub-tag to another sub-tag in the UI, the sub-tag has been duplicated into all of the other existing tags.
iDash with CA-7
This is a bug in the application.
The latest PreGA release of iDash (r12.0.05.00-0200) has resolved this issue and has been validated.
The fix will be included when iDash 12.0.05.00 goes GA.