When I select multiple items and copy paste all of them, the net labels also get copied. This results in massive connection errors because the newly pasted items are disconnected from the original (which is of course the case).
It is better to have a function called "automatically assign net labels" which re-assign all net labels according to connectivity.
In the illustration below, I have circled out two of the net errors:
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
