User sees a second image of a component that cannot be selected or removed.
Solution
One possible cause for this condition can be the following:
View-> Content-> More-> Mirror Display
This will create a "view only" copy of a component.
Notes and References
Hardware/Software Configuration
Platform: all
OS: n/a
OS Version: n/a
Product: NX
Application: ASSEMBLIES
Version: V1980
Function: ASSEMBLY_MODEL
Ref: 001-10129522