Partly found and partly lost media. What's the difference?

Going by my logic:
Partially found - It was completely lost, but we found a bit of it.
Partially lost - Only a part of it was lost. We have less to cheer about since we never had to find the found part.
Then again, I could be completely wrong.

Sorry, I'm messed up! I going to fix the Puttnam's Prairie Emporium, Eagle Sam, The Rogue Song and other pages.