If I understand you correctly, you want copies of your sequences that you can modify without changing the original sequence.
There are two ways to do this. You can right click on the sequence in the project panel, select copy then paste it back in and change the name.
Or, if you want the name to change on its own, just right click on the sequence in the project panel and select "Duplicate". It adds "copy" to the original name. You can still change the names of the sequences by right clicking and selecting "Rename".
Excellent Steve. Thank you. I will try this.