Resource/BMS Path merge strategy for duplicated songs?

[fnmdx111]

Suppose I have two downloads of the same song downloaded from two different locations. One of the downloads is borked and won't sound during gameplay. What is the merge strategy of beatoraja when dealing with duplicates?

For example, I have HAELEQUIN from the Genoside package at C:\genoside 2018 and another download from another source at D:\bms, if would expect whichever instance that's added later using the GUI is used (i.e. newly added overwrites the old). But in practice, no matter which order I add the song, the C:\genoside 2018 instance is always used.

Any lead for debugging this issue is appreciated. Thanks.