Not sure how you created Pop2.
Here is the easy way:
Create Pop1 and save it as you did.
Use Pop1 to create Pop2 by overwriting it and save as Pop2.
Does that make sense?
I created 50 banks this way:
I created bank 1. Done.
Then I just hit the save button and changed the number 1 to 2.
I repeated the process 49 times.
Now I have 50 Banks with 10 registrations each.
Of course at this point they are all the same.
Hit Bank two put your songs in and just save.
Hit bank 3 and repeat etc.
Hope this helps.
Eric