Please provide us the following details so that we can help you further:
- Lightroom Version
- Photoshop Elements Version
- Operating System Type
Do you have the same collection name under Collection panel in Lightroom as you had in Elements?
I'm using LR CC 2015.2.1. I converted from PS Elements 11, and I'm using a Windows 10 PC.
Yes, the collection names are the same both in PS Elements and LR.
Thankful for your help,
Please check the below article for the brief information on Collection set.
Hope it helps.
Thank you for the links your provided. Unfortunately, I did not find any information at those websites that resolved this problem for me.