<directory> changes name of last folder to album title when more than one folder is present

[Aletag]

Converting my music folder (C:Users\user\music...) and want to keep the original folder structure.
So I set the output to <directory+3>\<filename>
For files that are one folder within the path, it works fine: for instance, ..\music\folder1\track1.flac gets converted to ..\encoded\folder1\track1.flac
But when there is more than one subfolder, the last folder in the directory gets changed to the album title from the track metadata. For instance ..\music\collection1\folder1\track1.flac becomes ..\encoded\collection1\<albumtitle>\track1.flac
There is no apparent reason for this. The folder was initially titled like the album but I changed the name so it must be pulling it from the track metadata.

Edit: escaped backslashes