In 'File Status' view, with tree view selected and 'all files' , if you select 'sorted by filename' or 'sorted by path'  (i think they do the same thing when tree view is selected), then the files are correctly sorted.

However if you remove focus from SourceTree, and then give the focus back to SourceTree, this seems to cause a refresh of the File Status view, and the sort order is now incorrect.  The top level of tree is still correct - but any subfolders seem to be reverse sorted by file/folder name with the files and folders mixed together.

Found in version 3.3.8 (but i can't select that version below)