File load of similar name replaces original.

While preparing the part for this report https://musescore.org/en/node/283118, I found that when I loaded it into the program to make sure it was only that part, it replace the score rather than just adding it as a new "score". I never had that problem with previous editions of MS.

The names are obviously different, which leads me to believe that the program doesn't read enough of the file name, or ... ?? .