Hello, @datatraveller1 and All,
Many thanks for joining the Compare2Lists’s author and many thanks to Fatih Ramazan Çıkan which was able to get a quick new 1.7 version which fixes this annoying bug !
I also tried this software on that real example that I proposed in this post, some days ago :
https://community.notepad-plus-plus.org/post/105031
You can download this file from my Google Drive account :
https://drive.google.com/file/d/1aYOpKon4KYw_NXSdj4Tm4Ti_FrygC2ky/view?usp=sharing
Before using it with the Compare Two Lists software :
Delete the last column, which counts the number of records, with a column mode selection
Delete all trailing blank characters with the Edit > Blank operations > Trim Trailing Space option
Place all contents in the clipboard ( Ctrl + C )
Now, open the Compare Two Lists software
Paste all the resulting contents with the Paste button, associated with the List #1 panel
Check that the Settings > Cas sensitive option, if necessary
Click on the Remove Duplicates button, associated with the List #1 panel
=> You should see that it remains 50,822 records
And this is exactly the results produced when you use the cases #3 or #4 of my post ;-))
Best Regards,
guy038