Ctrl+Shift+Click behaves as Ctrl+Click for selection

[php4fan]

Steps to reproduce:

• connect to a server
• navigate to a folder on the server where you have at least a few files; let's say they are called "file1", "file2", ..., "file6" and they are sorted alphabetically
• click on file1 (file1 gets selected)
• Ctrl+Click on file3 (now file1 and file3 are selected)
• Ctrl+Shift+Click on file6

Expected:
Now file1 and files 3 to 6 should be selected. In other words, Ctrl+Shift+Click should add all files between the previously selected ones and the clicked one to the current selection.

Observed:
Only file1, file3 and file6 are selected, as if I had ctrl+clicked on file6 without holding the Shift key

The expected behavior of ctrl+click, shift+click and ctrl+shift+click is a universal well-established convention in both Windows and Linux and if I'm not mistaken also Mac with some variation (perhaps cmd instead of ctrl). It's been literally years since the last time I've stumbled upon some application that doesn't adhere to it.