If I use the command line to edit a new file, the tab for the file shows up in the leftmost position of the tab group, even though my "file tab sort order" is set to alphabetic. If I go to options and change to a different setting, and then back to alphabetic, the tabs get reordered properly and new files I open get put in the proper tab order. However, if I exit and restart SE, it goes back to putting newly opened files in the leftmost position.
Win 7 32-bit