Long playlist problems

[Skeeter]

I have a rather long playlist, over 1000 songs. When I try to create a copy for backup by adding to a new playlist, I am sometimes told that it can not be done at this time; at other times, nothing happens. If I try to add it to an existing playlist, nothing appears to happen, but when I edit the destination playlist, it appears that all of the songs are there, but not in the original order. (I have manually sorted it) The song count shown doesn't change. 

[AdamPandora]

@Skeeter Could you tell me a bit more about what is happening? Are you listening to Pandora on a computer or on a device?

1. If you are on a computer, are you listening from:
• A Mac or Windows computer?
  
• Our website, or the desktop app? If you're listening from our website, what browser are you using?
  
2. If you are on a device, what is the make and model (and carrier, if applicable)?
   
3. Is there an error message? If so, what does it say?
   
4. Can you provide me with a screenshot/screen recording of what you're seeing? 
   

Thanks for all your help with this!