Edits to a map package weren't saved

[AmeliaNewsam]

I downloaded a map package from Box, made extensive edits to it and saved many times, then closed.  When I reopened it, it had all gone back to the original.  What happened?  

[AmeliaNewsam]

Never mind, I realized I have to save it with a different name.  I didn't notice the "read only" notice after the package name.  It would be nice if you got some kind of warning or indication that even though the save function works exactly the same as normal, you're not actually saving.