don't use the complete path but the basename if the file/foder has no extension. Otherwise

we can end up with  different items in the shared directory with the same name (Also folder names can contain dots)

apps/files_sharing/lib/share/file.php

@@ -53,7 +53,7 @@ class OC_Share_Backend_File implements OCP\Share_Backend_File_Dependent {
 				$name = substr($target, 0, $pos);
 				$ext = substr($target, $pos);
 			} else {
-				$name = $filePath;
+				$name = $target;
 				$ext = '';
 			}
 			$i = 2;